1区化学

能源化学 Pub Date : 2023-09-27 DOI: 10.1016/j.jechem.2023.09.016

Jinglin Xian , Huiyu Jiang , Zhiao Wu , Huimin Yu , Kaisi Liu , Miao Fan , Rong Hu , Guangyu Fang , Liyun Wei , Jingyan Cai , Weilin Xu , Huanyu Jin , Jun Wan

{"title":"Microwave shock motivating the Sr substitution of 2D porous GdFeO3 perovskite for highly active oxygen evolution","authors":"Jinglin Xian , Huiyu Jiang , Zhiao Wu , Huimin Yu , Kaisi Liu , Miao Fan , Rong Hu , Guangyu Fang , Liyun Wei , Jingyan Cai , Weilin Xu , Huanyu Jin , Jun Wan","doi":"10.1016/j.jechem.2023.09.016","DOIUrl":"10.1016/j.jechem.2023.09.016","url":null,"abstract":"<div>The incorporation of partial A-site substitution in perovskite oxides represents a promising strategy for precisely controlling the electronic configuration and enhancing its intrinsic catalytic activity. Conventional methods for A-site substitution typically involve prolonged high-temperature processes. While these processes promote the development of unique nanostructures with highly exposed active sites, they often result in the uncontrolled configuration of introduced elements. Herein, we present a novel approach for synthesizing two-dimensional (2D) porous GdFeO3 perovskite with A-site strontium (Sr) substitution utilizing microwave shock method. This technique enables precise control of the Sr content and simultaneous construction of 2D porous structures in one step, capitalizing on the advantages of rapid heating and cooling (temperature ∼1100 K, rate ∼70 K s−1). The active sites of this oxygen-rich defect structure can be clearly revealed through the simulation of the electronic configuration and the comprehensive analysis of the crystal structure. For electrocatalytic oxygen evolution reaction application, the synthesized 2D porous Gd0.8Sr0.2FeO3 electrocatalyst exhibits an exceptional overpotential of 294 mV at a current density of 10 mA cm−2 and a small Tafel slope of 55.85 mV dec−1 in alkaline electrolytes. This study offers a fresh perspective on designing crystal configurations and the construction of nanostructures in perovskite.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 232-241"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2095495623005314/pdfft?md5=77e7eff90061bb67e396a2d6d55968dc&pid=1-s2.0-S2095495623005314-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134995405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Porous metal oxides in the role of electrochemical CO2 reduction reaction 多孔金属氧化物在电化学CO2还原反应中的作用

1区化学

能源化学 Pub Date : 2023-09-27 DOI: 10.1016/j.jechem.2023.09.018

Ziqi Zhang , Jinyun Xu , Yu Zhang , Liping Zhao , Ming Li , Guoqiang Zhong , Di Zhao , Minjing Li , Xudong Hu , Wenju Zhu , Chunming Zheng , Xiaohong Sun

{"title":"Porous metal oxides in the role of electrochemical CO2 reduction reaction","authors":"Ziqi Zhang , Jinyun Xu , Yu Zhang , Liping Zhao , Ming Li , Guoqiang Zhong , Di Zhao , Minjing Li , Xudong Hu , Wenju Zhu , Chunming Zheng , Xiaohong Sun","doi":"10.1016/j.jechem.2023.09.018","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.018","url":null,"abstract":"<div>The global energy-related CO2 emissions have rapidly increased as the world economy heavily relied on fossil fuels. This paper explores the pressing challenge of CO2 emissions and highlights the role of porous metal oxide materials in the electrocatalytic reduction of CO2 (CO2RR). The focus is on the development of robust and selective catalysts, particularly metal and metal-oxide-based materials. Porous metal oxides offer high surface area, enhancing the accessibility to active sites and improving reaction kinetics. The tunability of these materials allows for tailored catalytic behavior, targeting optimized reaction mechanisms for CO2RR. The work also discusses the various synthesis strategies and identifies key structural and compositional features, addressing challenges like high overpotential, poor selectivity, and low stability. Based on these insights, we suggest avenues for future research on porous metal oxide materials for electrochemical CO2 reduction.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 373-398"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137116361","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

A defective iron-based perovskite cathode for high-performance IT-SOFCs: Tailoring the oxygen vacancies using Nb/Ta co-doping 用于高性能IT-SOFCs的缺陷铁基钙钛矿阴极:利用Nb/Ta共掺杂裁剪氧空位

1区化学

能源化学 Pub Date : 2023-09-26 DOI: 10.1016/j.jechem.2023.09.015

Bayu Admasu Beshiwork , Xinyu Wan , Min Xu , Haoran Guo , Birkneh Sirak Teketel , Yu Chen , Jun Song Chen , Tingshuai Li , Enrico Traversa

{"title":"A defective iron-based perovskite cathode for high-performance IT-SOFCs: Tailoring the oxygen vacancies using Nb/Ta co-doping","authors":"Bayu Admasu Beshiwork , Xinyu Wan , Min Xu , Haoran Guo , Birkneh Sirak Teketel , Yu Chen , Jun Song Chen , Tingshuai Li , Enrico Traversa","doi":"10.1016/j.jechem.2023.09.015","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.015","url":null,"abstract":"<div>The sluggish kinetics of the electrochemical oxygen reduction reaction (ORR) in intermediate-temperature solid oxide fuel cells (IT-SOFCs) greatly limits the overall cell performance. In this study, an efficient and durable cathode material for IT-SOFCs is designed based on density functional theory (DFT) calculations by co-doping with Nb and Ta the B-site of the SrFeO3−δ perovskite oxide. The DFT calculations suggest that Nb/Ta co-doping can regulate the energy band of the parent SrFeO3−δ and help electron transfer. In symmetrical cells, such cathode with a SrFe0.8Nb0.1Ta0.1O3−δ (SFNT) detailed formula achieves a low cathode polarization resistance of 0.147 Ω cm2 at 650 °C. Electron spin resonance (ESR) and X-ray photoelectron spectroscopy (XPS) analysis confirm that the co-doping of Nb/Ta in SrFeO3−δ B-site increases the balanced concentration of oxygen vacancies, enhancing the electrochemical performance when compared to 20 mol% Nb single-doped perovskite oxide. The cathode button cell with Ni-SDC|SDC|SFNT configuration achieves an outstanding peak power density of 1.3 W cm−2 at 650 °C. Moreover, the button cell shows durability for 110 h under 0.65 V at 600 °C using wet H2 as fuel.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 306-316"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92280373","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

Active and passive modulation of solar light transmittance in a uniquely multifunctional dual-band single molecule for smart window applications 主动和被动调制太阳光透过率在一个独特的多功能双波段单分子智能窗口应用

1区化学

能源化学 Pub Date : 2023-09-26 DOI: 10.1016/j.jechem.2023.09.014

Pooja V. Chavan , Pramod V. Rathod , Joohyung Lee , Sergei V. Kostjuk , Hern Kim

{"title":"Active and passive modulation of solar light transmittance in a uniquely multifunctional dual-band single molecule for smart window applications","authors":"Pooja V. Chavan , Pramod V. Rathod , Joohyung Lee , Sergei V. Kostjuk , Hern Kim","doi":"10.1016/j.jechem.2023.09.014","DOIUrl":"10.1016/j.jechem.2023.09.014","url":null,"abstract":"<div>Functional materials may change color by heat and electricity separately or simultaneously in smart windows. These materials have not only demonstrated remarkable potential in the modulation of solar radiation but are also leading to the development of indoor environments that are more comfortable and conducive to improving individuals' quality of life. Unfortunately, dual-responsive materials have not received ample research attention due to economic and technological challenges. As a consequence, the broader utilization of smart windows faces hindrances. To address this new generational multi-stimulus responsive chromic materials, our group has adopted a developmental strategy to create a poly(NIPAM)n-HV as a switchable material by anchoring active viologen (HV) onto a phase-changing poly(NIPAM)n-based smart material for better utility and activity. These constructed smart windows facilitate individualistic reversible switching, from a highly transparent state to an opaque state (thermochromic) and a red state (electrochromic), as well as facilitate a simultaneous dual-stimuli response reversible switching from a clear transparent state to a fully opaque (thermochromic) and orange (electrochromic) states. Absolute privacy can be attained in smart windows designed for exclusive settings by achieving zero transmittance. Each unique chromic mode operates independently and modulates visible and near-infrared (NIR) light in a distinct manner. Hence, these smart windows with thermal and electric dual-stimuli responsiveness demonstrate remarkable heat regulation capabilities, rendering them highly attractive for applications in building facades, energy harvesting, privacy protection, and color display.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 293-305"},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134915392","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 : 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":"2023-09-22","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

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 : 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":"2023-09-22","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

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 : 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":"2023-09-22","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

Tuning electronic structure of RuO2 by single atom Zn and oxygen vacancies to boost oxygen evolution reaction in acidic medium 利用单原子Zn和氧空位调节RuO2的电子结构以促进酸性介质中的析氧反应

1区化学

能源化学 Pub Date : 2023-09-22 DOI: 10.1016/j.jechem.2023.09.010

Qing Qin , Tiantian Wang , Zijian Li , Guolin Zhang , Haeseong Jang , Liqiang Hou , Yu Wang , Min Gyu Kim , Shangguo Liu , Xien Liu

{"title":"Tuning electronic structure of RuO2 by single atom Zn and oxygen vacancies to boost oxygen evolution reaction in acidic medium","authors":"Qing Qin , Tiantian Wang , Zijian Li , Guolin Zhang , Haeseong Jang , Liqiang Hou , Yu Wang , Min Gyu Kim , Shangguo Liu , Xien Liu","doi":"10.1016/j.jechem.2023.09.010","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.010","url":null,"abstract":"<div>The poor stability of RuO2 electrocatalysts has been the primary obstacles for their practical application in polymer electrolyte membrane electrolyzers. To dramatically enhance the durability of RuO2 to construct activity-stability trade-off model is full of significance but challenging. Herein, a single atom Zn stabilized RuO2 with enriched oxygen vacancies (SA Zn-RuO2) is developed as a promising alternative to iridium oxide for acidic oxygen evolution reaction (OER). Compared with commercial RuO2, the enhanced Ru–O bond strength of SA Zn-RuO2 by forming Zn-O-Ru local structure motif is favorable to stabilize surface Ru, while the electrons transferred from Zn single atoms to adjacent Ru atoms protects the Ru active sites from overoxidation. Simultaneously, the optimized surrounding electronic structure of Ru sites in SA Zn-RuO2 decreases the adsorption energies of OER intermediates to reduce the reaction barrier. As a result, the representative SA Zn-RuO2 exhibits a low overpotential of 210 mV to achieve 10 mA cm−2 and a greatly enhanced durability than commercial RuO2. This work provides a promising dual-engineering strategy by coupling single atom doping and vacancy for the tradeoff of high activity and catalytic stability toward acidic OER.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 94-102"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67740089","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

Exciting lattice oxygen of nickel–iron bi-metal alkoxide for efficient electrochemical oxygen evolution reaction 镍-铁双金属醇盐激发晶格氧进行高效电化学析氧反应

1区化学

能源化学 Pub Date : 2023-09-22 DOI: 10.1016/j.jechem.2023.09.013

Saihang Zhang , Senchuan Huang , Fengzhan Sun , Yinghui Li , Li Ren , Hao Xu , Zhao Li , Yifei Liu , Wei Li , Lina Chong , Jianxin Zou

{"title":"Exciting lattice oxygen of nickel–iron bi-metal alkoxide for efficient electrochemical oxygen evolution reaction","authors":"Saihang Zhang , Senchuan Huang , Fengzhan Sun , Yinghui Li , Li Ren , Hao Xu , Zhao Li , Yifei Liu , Wei Li , Lina Chong , Jianxin Zou","doi":"10.1016/j.jechem.2023.09.013","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.09.013","url":null,"abstract":"<div>High efficiency, cost-effective and durable electrocatalysts are of pivotal importance in energy conversion and storage systems. The electro-oxidation of water to oxygen plays a crucial role in such energy conversion technologies. Herein, we report a robust method for the synthesis of a bimetallic alkoxide for efficient oxygen evolution reaction (OER) for alkaline electrolysis, which yields current density of 10 mA cm−2 at an overpotential of 215 mV in 0.1 M KOH electrolyte. The catalyst demonstrates an excellent durability for more than 540 h operation with negligible degradation in activity. Raman spectra revealed that the catalyst underwent structure reconstruction during OER, evolving into oxyhydroxide, which was the active site proceeding OER in alkaline electrolyte. In-situ synchrotron X-ray absorption experiment combined with density functional theory calculation suggests a lattice oxygen involved electrocatalytic reaction mechanism for the in-situ generated nickel–iron bimetal-oxyhydroxide catalyst. This mechanism together with the synergy between nickel and iron are responsible for the enhanced catalytic activity and durability. These findings provide promising strategies for the rational design of non-noble metal OER catalysts.</div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 194-201"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67740103","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

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 : 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":"2023-09-20","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

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