1区化学

能源化学 Pub Date : 2024-01-01 Epub Date: 2023-09-28 DOI: 10.1016/j.jechem.2023.09.023

Devthade Vidyasagar , Yeonghun Yun , Jae Yu Cho , Hyemin Lee , Kyung Won Kim , Yong Tae Kim , Sung Woong Yang , Jina Jung , Won Chang Choi , Seonu Kim , Rajendra Kumar Gunasekaran , Seok Beom Kang , Kwang Heo , Dong Hoe Kim , Jaeyeong Heo , Sangwook Lee

{"title":"Surface-functionalized hole-selective monolayer for high efficiency single-junction wide-bandgap and monolithic tandem perovskite solar cells","authors":"Devthade Vidyasagar , Yeonghun Yun , Jae Yu Cho , Hyemin Lee , Kyung Won Kim , Yong Tae Kim , Sung Woong Yang , Jina Jung , Won Chang Choi , Seonu Kim , Rajendra Kumar Gunasekaran , Seok Beom Kang , Kwang Heo , Dong Hoe Kim , Jaeyeong Heo , Sangwook Lee","doi":"10.1016/j.jechem.2023.09.023","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.023","url":null,"abstract":"<div>Carbazole moiety-based 2PACz ([2-(9H-carbazol-9-yl)ethyl]phosphonic acid) self-assembled monolayers (SAMs) are excellent hole-selective contact (HSC) materials with abilities to excel the charge-transfer-dynamics of perovskite solar cells (PSCs). Herein, we report a facile but powerful method to functionalize the surface of 2PACz-SAM, by which reproducible, highly stable, high-efficiency wide-bandgap PSCs can be obtained. The 2PACz surface treatment with various donor number solvents improves assembly of 2PACz-SAM and leave residual surface-bound solvent molecules on 2PACz-SAM, which increases perovskite grain size, retards halide segregation, and accelerates hole extraction. The surface functionalization achieves a high power conversion efficiency (PCE) of 17.62% for a single-junction wide-bandgap (∼1.77 eV) PSC. We also demonstrate a monolithic all-perovskite tandem solar cell using surface-engineered HSC, showing high PCE of 24.66% with large open-circuit voltage of 2.008 V and high fill-factor of 81.45%. Our results suggest this simple approach can further improve the tandem device, when coupled with a high-performance narrow-bandgap sub-cell.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 317-326"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92360316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rational design of vitamin C/defective carbon van der Waals heterostructure for enhanced activity, durability and storage stability toward oxygen reduction reaction 维生素C/缺陷碳范德华异质结构的合理设计，提高氧还原反应的活性、耐久性和储存稳定性

1区化学

能源化学 Pub Date : 2024-01-01 Epub Date: 2023-09-22 DOI: 10.1016/j.jechem.2023.09.011

Ruiqi Cheng , Kaiqi Li , Huanxin Li , Tianshuo Zhao , Yibo Wang , Qingyue Xue , Jiao Zhang , Chaopeng Fu

{"title":"Rational design of vitamin C/defective carbon van der Waals heterostructure for enhanced activity, durability and storage stability toward oxygen reduction reaction","authors":"Ruiqi Cheng , Kaiqi Li , Huanxin Li , Tianshuo Zhao , Yibo Wang , Qingyue Xue , Jiao Zhang , Chaopeng Fu","doi":"10.1016/j.jechem.2023.09.011","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.011","url":null,"abstract":"<div>Metal-free defective carbon materials with abundant active sites have been widely studied as low-cost and efficient oxygen reduction reaction (ORR) electrocatalysts in metal-air batteries. However, the active sites in defective carbon are easily subjected to serious oxidation or hydroxylation during ORR or storage, leading to rapid degradation of activity. Herein, we design a van der Waals heterostructure comprised of vitamin C (VC) and defective carbon (DC) to not only boost the activity but also enhance the durability and storage stability of the DC-VC electrocatalyst. The formation of VC van der Waals between DC and VC is demonstrated to be an effective strategy to protect the defect active sites from oxidation and hydroxylation degradation, thus significantly enhancing the electrochemical durability and storage anti-aging performance. Moreover, the DC-VC van der Waals can reduce the reaction energy barrier to facilitate the ORR. These findings are also confirmed by operando Fourier transform infrared spectroscopy and density functional theory calculations. It is necessary to mention that the preparation of this DC-VC electrocatalyst can be scaled up, and the ORR performance of the largely produced electrocatalyst is demonstrated to be very consistent. Furthermore, the DC-VC-based aluminum-air batteries display very competitive power density with good performance maintenance.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 103-111"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67740084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface engineering of ZnO electrocatalyst by N doping towards electrochemical CO2 reduction 氮掺杂ZnO电催化剂的表面工程电化学还原CO2

1区化学

能源化学 Pub Date : 2024-01-01 Epub Date: 2023-09-19 DOI: 10.1016/j.jechem.2023.09.007

Rohini Subhash Kanase , Getasew Mulualem Zewdie , Maheswari Arunachalam , Jyoti Badiger , Suzan Abdelfattah Sayed , Kwang-Soon Ahn , Jun-Seok Ha , Uk Sim , Hyeyoung Shin , Soon Hyung Kang

{"title":"Surface engineering of ZnO electrocatalyst by N doping towards electrochemical CO2 reduction","authors":"Rohini Subhash Kanase , Getasew Mulualem Zewdie , Maheswari Arunachalam , Jyoti Badiger , Suzan Abdelfattah Sayed , Kwang-Soon Ahn , Jun-Seok Ha , Uk Sim , Hyeyoung Shin , Soon Hyung Kang","doi":"10.1016/j.jechem.2023.09.007","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.007","url":null,"abstract":"<div>The discovery of efficient, selective, and stable electrocatalysts can be a key point to produce the large-scale chemical fuels via electrochemical CO2 reduction (ECR). In this study, an earth-abundant and nontoxic ZnO-based electrocatalyst was developed for use in gas-diffusion electrodes (GDE), and the effect of nitrogen (N) doping on the ECR activity of ZnO electrocatalysts was investigated. Initially, a ZnO nanosheet was prepared via the hydrothermal method, and nitridation was performed at different times to control the N-doping content. With an increase in the N-doping content, the morphological properties of the nanosheet changed significantly, namely, the 2D nanosheets transformed into irregularly shaped nanoparticles. Furthermore, the ECR performance of ZnO electrocatalysts with different N-doping content was assessed in 1.0 M KHCO3 electrolyte using a gas-diffusion electrode-based ECR cell. While the ECR activity increased after a small amount of N doping, it decreased for higher N doping content. Among them, the N:ZnO-1 h electrocatalysts showed the best CO selectivity, with a faradaic efficiency (FECO) of 92.7% at −0.73 V vs. reversible hydrogen electrode (RHE), which was greater than that of an undoped ZnO electrocatalyst (FECO of 63.4% at −0.78 VRHE). Also, the N:ZnO-1 h electrocatalyst exhibited outstanding durability for 16 h, with a partial current density of −92.1 mA cm−2. This improvement of N:ZnO-1 h electrocatalyst can be explained by density functional theory calculations, demonstrating that this improvement of N:ZnO-1 h electrocatalyst comes from (i) the optimized active sites lowering the free energy barrier for the rate-determining step (RDS), and (ii) the modification of electronic structure enhancing the electron transfer rate by N doping.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 71-81"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67740086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tuning the crystalline and electronic structure of ZrO2 via oxygen vacancies and nano-structuring for polysulfides conversion in lithium-sulfur batteries 通过氧空位和纳米结构调节ZrO2的晶体和电子结构，用于锂硫电池中的多硫化物转化

1区化学

能源化学 Pub Date : 2024-01-01 Epub Date: 2023-09-16 DOI: 10.1016/j.jechem.2023.09.003

Shengnan Fu , Chaowei Hu , Jing Li , Hongtao Cui , Yuanyuan Liu , Kaihua Liu , Yanzhao Yang , Meiri Wang

{"title":"Tuning the crystalline and electronic structure of ZrO2 via oxygen vacancies and nano-structuring for polysulfides conversion in lithium-sulfur batteries","authors":"Shengnan Fu , Chaowei Hu , Jing Li , Hongtao Cui , Yuanyuan Liu , Kaihua Liu , Yanzhao Yang , Meiri Wang","doi":"10.1016/j.jechem.2023.09.003","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.003","url":null,"abstract":"<div>The recent emergence of tetragonal phases zirconium dioxide (ZrO2) with vacancies has generated significant interest as a highly efficient and stable electrocatalyst with potential applications in trapping polysulfides and facilitating rapid conversion in lithium-sulfur batteries (LSBs). However, the reduction of ZrO2 is challenging, even under strong reducing atmospheres at high temperatures and pressures. Consequently, the limited presence of oxygen vacancies results in insufficient active sites and reaction interfaces, thereby hindering practical implementation. Herein, we successfully introduced abundant oxygen vacancies into ZrO2 at the nanoscale with the help of carbon nanotubes (CNTs-OH) through hydrogen-etching at lower temperatures and pressures. The introduced oxygen vacancies on ZrO2−x/CNTs-OH can effectively rearrange charge distribution, enhance sulfiphilicity and increase active sites, contributing to high ionic and electronic transfer kinetics, strong binding energy and low redox barriers between polysulfides and ZrO2−x. These findings have been experimentally validated and supported by theory calculations. As a result, LSBs assembled with the ZrO2−x/CNTs-OH modified separators demonstrate excellent rate performance, superior cycling stability, and ultra-high sulfur utilization. Especially, at high sulfur loading of 6 mg cm−2, the area capacity is still up to 6.3 mA h cm−2. This work provides valuable insights into the structural and functional optimization of electrocatalysts for batteries.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 82-93"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67740087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From charge storage mechanism to performance: A strategy toward boosted lithium/sodium storage through heterostructure optimization 从电荷存储机制到性能：通过异质结构优化提高锂/钠存储的策略

1区化学

能源化学 Pub Date : 2024-01-01 Epub Date: 2023-09-22 DOI: 10.1016/j.jechem.2023.09.012

Xiaoke Zhang , Guangfa Deng , Mianying Huang , Zhaohui Xu , Jianlin Huang , Xuan Xu , Zhiguang Xu , Maochan Li , Lei Hu , Xiaoming Lin

{"title":"From charge storage mechanism to performance: A strategy toward boosted lithium/sodium storage through heterostructure optimization","authors":"Xiaoke Zhang , Guangfa Deng , Mianying Huang , Zhaohui Xu , Jianlin Huang , Xuan Xu , Zhiguang Xu , Maochan Li , Lei Hu , Xiaoming Lin","doi":"10.1016/j.jechem.2023.09.012","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.012","url":null,"abstract":"<div>Solving the problems of low electrical conductivity and poor cycling durability in transition metal oxides-based anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) has already turned into an urgent requirement. In this paper, we successfully synthesized Co2VO4/Co compounds with Co-V-MOF (metal-organic framework) as a sacrificial template and investigated their electrochemical mechanism in order to improve the electrochemical properties of LIBs and SIBs. The optimized heaping configuration and the existence of metallic Co catalyzed the formation of radical ions, thereby facilitating higher conductivity, shortening Li+ and Na+ transport paths, and providing more active sites. Co2VO4/Co constructed with 2-methylimidazole as a ligand showed a discharge capacity of 1605.1 mA h g−1 after 300 cycles at 0.1 A g−1 in LIB and 677.2 mA h g−1 in SIB. Density functional theory (DFT) calculation emphasizes the crucial role of Co2VO4/Co in enhancing electrode conductivity, decreasing the migratory energy barrier, and thereby strengthening electrochemical properties. This heterostructure building technique may pave the way for the development of high-performance LIBs and SIBs. Furthermore, the problem of the low first-loop coulombic efficiency faced by transition metal oxides is improved.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 112-124"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67740088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chloride ion battery: A new emerged electrochemical system for next-generation energy storage 氯离子电池：用于下一代储能的新兴电化学系统

1区化学

能源化学 Pub Date : 2024-01-01 Epub Date: 2023-09-19 DOI: 10.1016/j.jechem.2023.08.055

Shulin Chen , Lu Wu , Yu Liu , Peng Zhou , Qinyou An , Liqiang Mai

{"title":"Chloride ion battery: A new emerged electrochemical system for next-generation energy storage","authors":"Shulin Chen , Lu Wu , Yu Liu , Peng Zhou , Qinyou An , Liqiang Mai","doi":"10.1016/j.jechem.2023.08.055","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.08.055","url":null,"abstract":"<div>In the scope of developing new electrochemical concepts to build batteries with high energy density, chloride ion batteries (CIBs) have emerged as a candidate for the next generation of novel electrochemical energy storage technologies, which show the potential in matching or even surpassing the current lithium metal batteries in terms of energy density, dendrite-free safety, and elimination of the dependence on the strained lithium and cobalt resources. However, the development of CIBs is still at the initial stage with unsatisfactory performance and several challenges have hindered them from reaching commercialization. In this review, we examine the current advances of CIBs by considering the electrode material design to the electrolyte, thus outlining the new opportunities of aqueous CIBs especially combined with desalination, chloride redox battery, etc. With respect to the developing road of lithium ion and fluoride ion batteries, the possibility of using solid-state chloride ion conductors to replace liquid electrolytes is tentatively discussed. Going beyond, perspectives and clear suggestions are concluded by highlighting the major obstacles and by prescribing specific research topics to inspire more efforts for CIBs in large-scale energy storage applications.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 154-168"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67740100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Single atom Cu-N-C catalysts for the electro-reduction of CO2 to CO assessed by rotating ring-disc electrode 通过旋转环盘电极评估用于CO2电还原为CO的单原子Cu-N-C催化剂

1区化学

能源化学 Pub Date : 2024-01-01 Epub Date: 2023-09-20 DOI: 10.1016/j.jechem.2023.09.005

S. Pérez-Rodríguez , M. Gutiérrez-Roa , C. Giménez-Rubio , D. Ríos-Ruiz , P. Arévalo-Cid , M.V. Martínez-Huerta , A. Zitolo , M.J. Lázaro , D. Sebastián

{"title":"Single atom Cu-N-C catalysts for the electro-reduction of CO2 to CO assessed by rotating ring-disc electrode","authors":"S. Pérez-Rodríguez , M. Gutiérrez-Roa , C. Giménez-Rubio , D. Ríos-Ruiz , P. Arévalo-Cid , M.V. Martínez-Huerta , A. Zitolo , M.J. Lázaro , D. Sebastián","doi":"10.1016/j.jechem.2023.09.005","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.005","url":null,"abstract":"<div>The electrochemical CO2 reduction reaction (CO2RR) to controllable chemicals is considered as a promising pathway to store intermittent renewable energy. Herein, a set of catalysts based on copper-nitrogen-doped carbon xerogel (Cu-N-C) are successfully developed varying the copper amount and the nature of the copper precursor, for the efficient CO2RR. The electrocatalytic performance of Cu-N-C materials is assessed by a rotating ring-disc electrode (RRDE), technique still rarely explored for CO2RR. For comparison, products are also characterized by online gas chromatography in a H-cell. The as-synthesized Cu-N-C catalysts are found to be active and highly CO selective at low overpotentials (from −0.6 to −0.8 V vs. RHE) in 0.1 M KHCO3, while H2 from the competitive water reduction appears at larger overpotentials (−0.9 V vs. RHE). The optimum copper acetate-derived catalyst containing Cu-N4 moieties exhibits a CO2-to-CO turnover frequency of 997 h−1 at −0.9 V vs. RHE with a H2/CO ratio of 1.8. These results demonstrate that RRDE configuration can be used as a feasible approach for identifying electrolysis products from CO2RR.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 169-182"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67740102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Ag-integrated mixed metallic Co-Fe-Ni-Mn hydroxide composite as advanced electrode for high-performance hybrid supercapacitors 银集成混合金属Co-Fe-Ni-Mn氢氧化物复合材料作为高性能混合超级电容器的先进电极

1区化学

能源化学 Pub Date : 2024-01-01 Epub Date: 2023-10-13 DOI: 10.1016/j.jechem.2023.09.041

Anki Reddy Mule, Bhimanaboina Ramulu, Shaik Junied Arbaz, Anand Kurakula, Jae Su Yu

{"title":"Ag-integrated mixed metallic Co-Fe-Ni-Mn hydroxide composite as advanced electrode for high-performance hybrid supercapacitors","authors":"Anki Reddy Mule, Bhimanaboina Ramulu, Shaik Junied Arbaz, Anand Kurakula, Jae Su Yu","doi":"10.1016/j.jechem.2023.09.041","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.041","url":null,"abstract":"<div>Direct growth of redox-active noble metals and rational design of multifunctional electrochemical active materials play crucial roles in developing novel electrode materials for energy storage devices. In this regard, silver (Ag) has attracted great attention in the design of efficient electrodes. Inspired by the house/building process, which means electing the right land, it lays a strong foundation and building essential columns for a complex structure. Herein, we report the construction of multifaceted heterostructure cobalt-iron hydroxide (CFOH) nanowires (NWs)@nickel cobalt manganese hydroxides and/or hydrate (NCMOH) nanosheets (NSs) on the Ag-deposited nickel foam and carbon cloth (i.e., Ag/NF and Ag/CC) substrates. Moreover, the formation and charge storage mechanism of Ag are described, and these contribute to good conductive and redox chemistry features. The switching architectural integrity of metal and redox materials on metallic frames may significantly boost charge storage and rate performance with noticeable drop in resistance. The as-fabricated Ag@CFOH@NCMOH/NF electrode delivered superior areal capacity value of 2081.9 µA h cm−2 at 5 mA cm−2. Moreover, as-assembled hybrid cell based on NF (HC/NF) device exhibited remarkable areal capacity value of 1.82 mA h cm−2 at 5 mA cm−2 with excellent rate capability of 74.77% even at 70 mA cm−2 Furthermore, HC/NF device achieved maximum energy and power densities of 1.39 mW h cm−2 and 42.35 mW cm−2, respectively. To verify practical applicability, both devices were also tested to serve as a self-charging station for various portable electronic devices.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 579-591"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92261413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reversed charge transfer induced by nickel in Fe-Ni/Mo2C@nitrogen-doped carbon nanobox for promoted reversible oxygen electrocatalysis Fe-Ni/Mo2C@nitrogen-doped碳纳米盒中镍诱导的反向电荷转移促进可逆氧电催化

1区化学

能源化学 Pub Date : 2024-01-01 Epub Date: 2023-09-22 DOI: 10.1016/j.jechem.2023.09.009

Zhicheng Nie , Lei Zhang , Qiliang Zhu , Zhifan Ke , Yingtang Zhou , Thomas Wågberg , Guangzhi Hu

{"title":"Reversed charge transfer induced by nickel in Fe-Ni/Mo2C@nitrogen-doped carbon nanobox for promoted reversible oxygen electrocatalysis","authors":"Zhicheng Nie , Lei Zhang , Qiliang Zhu , Zhifan Ke , Yingtang Zhou , Thomas Wågberg , Guangzhi Hu","doi":"10.1016/j.jechem.2023.09.009","DOIUrl":"10.1016/j.jechem.2023.09.009","url":null,"abstract":"<div>The interaction between metal and support is critical in oxygen catalysis as it governs the charge transfer between these two entities, influences the electronic structures of the supported metal, affects the adsorption energies of reaction intermediates, and ultimately impacts the catalytic performance. In this study, we discovered a unique charge transfer reversal phenomenon in a metal/carbon nanohybrid system. Specifically, electrons were transferred from the metal-based species to N-doped carbon, while the carbon support reciprocally donated electrons to the metal domain upon the introduction of nickel. This led to the exceptional electrocatalytic performances of the resulting Ni-Fe/Mo2C@nitrogen-doped carbon catalyst, with a half-wave potential of 0.91 V towards oxygen reduction reaction (ORR) and a low overpotential of 290 mV at 10 mA cm−2 towards oxygen evolution reaction (OER) under alkaline conditions. Additionally, the Fe-Ni/Mo2C@carbon heterojunction catalyst demonstrated high specific capacity (794 mA h gZn−1) and excellent cycling stability (200 h) in a Zn-air battery. Theoretical calculations revealed that Mo2C effectively inhibited charge transfer from Fe to the support, while secondary doping of Ni induced a charge transfer reversal, resulting in electron accumulation in the Fe-Ni alloy region. This local electronic structure modulation significantly reduced energy barriers in the oxygen catalysis process, enhancing the catalytic efficiency of both ORR and OER. Consequently, our findings underscore the potential of manipulating charge transfer reversal between the metal and support as a promising strategy for developing highly-active and durable bi-functional oxygen electrodes.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 202-212"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135685819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Integration of earth-abundant cocatalysts for high-performance photoelectrochemical energy conversion 集成高效光电化学能量转换的地球富集助催化剂

1区化学

能源化学 Pub Date : 2024-01-01 Epub Date: 2023-10-10 DOI: 10.1016/j.jechem.2023.09.021

Joonhee Ma , Sang Hyun Ahn , Soo Young Kim

{"title":"Integration of earth-abundant cocatalysts for high-performance photoelectrochemical energy conversion","authors":"Joonhee Ma , Sang Hyun Ahn , Soo Young Kim","doi":"10.1016/j.jechem.2023.09.021","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.021","url":null,"abstract":"<div>Photoelectrochemical (PEC) energy conversion has emerged as a promising and efficient approach to sustainable energy harvesting and storage. By utilizing semiconductor photoelectrodes, PEC devices can harness solar energy and drive electrochemical reactions such as water splitting or carbon dioxide (CO2) reduction to generate clean fuels and value-added chemicals. However, PEC energy conversion faces several challenges such as high overpotential, sluggish reaction kinetics, charge carrier recombination, and stability issues, which limit its practical implementation. Recently, significant research has been conducted to improve the overall conversion efficiency of PEC devices. One particularly promising approach is the use of cocatalysts, which involves introducing specific cocatalysts onto the photoelectrode surface to promote charge separation, improve reaction kinetics, and reduce the overpotential, thereby enhancing the overall performance of PEC energy conversion. This review provides a comprehensive overview of the recent developments in the earth-abundant cocatalysts for PEC water splitting and CO2 reduction. The main earth-abundant catalysts for the PEC water splitting include transition-metal dichalcogenide (TMD)-based materials, metal phosphides/carbides, and metal oxides/hydroxides. Meanwhile, PEC-CO2RR was divided into C1 and C2+ based on the final product since various products could be produced, focusing on diverse earth-abundant materials-based cocatalysts. In addition, we provide and highlight key advancements achieved in the very recent reports on novel PEC system design engineering with cocatalysts. Finally, the current problems associated with PEC systems are discussed along with a suggested direction to overcome these obstacles.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 336-355"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92280357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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