Electrocatalysis最新文献_第7页

Cost-Effective Electrodeposited Mixed Transition Metal Electrocatalysts for Efficient Hydrogen Evolution Reaction 用于高效氢气进化反应的低成本电沉积混合过渡金属电催化剂

IF 2.7 4区化学

Electrocatalysis Pub Date : 2024-02-07 DOI: 10.1007/s12678-024-00864-z

Saeedeh Golrokhifar, Ali Shahroudi, Sajjad Habibzadeh

{"title":"Cost-Effective Electrodeposited Mixed Transition Metal Electrocatalysts for Efficient Hydrogen Evolution Reaction","authors":"Saeedeh Golrokhifar, Ali Shahroudi, Sajjad Habibzadeh","doi":"10.1007/s12678-024-00864-z","DOIUrl":"10.1007/s12678-024-00864-z","url":null,"abstract":"<div><p>Hydrogen is a clean fuel with high energy density, considered one of the alternative energy sources of the future. Hydrogen evolution reaction (HER) could produce pure hydrogen on a large scale while striving for effective electrocatalysts. Here, binary and ternary mixed transition metals (Mn, Co, and Ni) were synthesized by an electrodeposition method and employed as efficient HER electrocatalysts. It was found that the combination of transition metals could positively tune the corresponding morphology and activity rather than using single metals. Namely, NiMn electrocatalysts with an onset potential of 83 mV and a Tafel slope of 103 <span>(frac{mV}{dec})</span> showed superior activity toward HER in alkaline media compared to the other developed electrocatalysts. This high activity was related to improved intrinsic activity, higher energy efficiency, and enhanced conductivity thanks to the synergy between manganese and nickel. NiMn electrocatalyst also displayed a durable and stable performance, rendering it a promising electrocatalyst for efficient electrocatalysis of HER.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 2-3","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139762982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Enhanced Catalytic Performance of Carbon Nitride-Functionalized Titanium Dioxide through Efficient Oxygen Vacancy Defect Engineering for Electrochemical Recognition of Epinephrine 通过高效氧空位缺陷工程提高氮化碳官能化二氧化钛的催化性能，用于肾上腺素的电化学识别

IF 2.7 4区化学

Electrocatalysis Pub Date : 2024-01-03 DOI: 10.1007/s12678-023-00860-9

Chandan Saha, Sarit K. Ghosh, Pooja Kumari, Venkata K. Perla, Harishchandra Singh, Kaushik Mallick

{"title":"Enhanced Catalytic Performance of Carbon Nitride-Functionalized Titanium Dioxide through Efficient Oxygen Vacancy Defect Engineering for Electrochemical Recognition of Epinephrine","authors":"Chandan Saha, Sarit K. Ghosh, Pooja Kumari, Venkata K. Perla, Harishchandra Singh, Kaushik Mallick","doi":"10.1007/s12678-023-00860-9","DOIUrl":"10.1007/s12678-023-00860-9","url":null,"abstract":"<div><p>Oxygen defect engineering is a reliable and efficient approach to modulate the electronic structure of metal oxides for the improvement of catalytic efficiency. In this work, carbon nitride supported titanium dioxide nanoparticle, with the space group of I41/amd, was prepared using a high temperature synthesis route. Transmission electron microscope study revealed that titanium dioxide particle were dispersed uniformly on the carbon nitride network. The X-ray photoelectron spectroscopy analysis predicted the formation of oxygen defects in the matrix of titanium oxide, and it also indicated the presence of titanium ions with mixed valence states. The synthesized hybrid system was evaluated as an electrocatalyst for the electrochemical detection of epinephrine using cyclic voltammetric and square wave voltammetric techniques. A custom-made device was also fabricated using synthesized hybrid material for the purpose of evaluating the electrochemical sensing of epinephrine in a pharmaceutical sample.</p></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 2-3","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12678-023-00860-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139095118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Degradation of Aspirin in a Microbial Fuel Cell Powered Electro-Fenton System Using an Etched Graphite Felt Cathode 在使用蚀刻石墨毡阴极的微生物燃料电池驱动电-芬顿系统中降解阿司匹林

IF 2.7 4区化学

Electrocatalysis Pub Date : 2023-12-28 DOI: 10.1007/s12678-023-00861-8

Juliana John, Rinu Anna Koshy, Haribabu Krishnan, Aswathy Asok

{"title":"Degradation of Aspirin in a Microbial Fuel Cell Powered Electro-Fenton System Using an Etched Graphite Felt Cathode","authors":"Juliana John, Rinu Anna Koshy, Haribabu Krishnan, Aswathy Asok","doi":"10.1007/s12678-023-00861-8","DOIUrl":"10.1007/s12678-023-00861-8","url":null,"abstract":"<div><p>Pharmaceutical wastewater containing contaminants like aspirin, ofloxacin, and amoxicillin are emerging as a worldwide issue due to its significant effects on the ecosystem and public health. In this study, wastewater containing aspirin was treated by using Mn<sub>3</sub>O<sub>4</sub> etched graphite felt (EGF) as a cathode in an MFC-powered electro-Fenton system. The electrochemical characterization of etched electrodes revealed that etching at 400 °C for 1.5 h showed the highest electrochemical activity and rapid electron transfer with a peak current of − 0.058A. The physicochemical characterization exhibited a porous morphology with high defect concentration (I<sub>D</sub>/I<sub>G</sub> ratio of 1.56) and increased specific surface area and superhydrophilicity, proving its ability to regenerate Fe<sup>2+</sup> on the cathodic surface and promote H<sub>2</sub>O<sub>2</sub> generation. MFC exhibits a maximum power density of 0.053 W/m<sup>2</sup> and a current density of 0.516 A/<span>({{text{m}}}^{2})</span>. Under optimized conditions of 0.7 mM iron concentration, pH 3, and 100 Ω resistance, the MFC-powered electro-Fenton system showed a maximum of 95.85% aspirin degradation in 30 h with a highest H<sub>2</sub>O<sub>2</sub> generation of 11.84 mg/l. The results highlight the potential of EGF electrodes as efficient cathodes in MFC-powered electro-Fenton systems and suggest that this technology can be opted as an energy-saving system for degrading pharmaceuticals such as aspirin from wastewater.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 1","pages":"143 - 158"},"PeriodicalIF":2.7,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139070438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Degradation of Rhodamine B by UV-Assisted Dynamic Diaphragm Electrocatalytic System: Efficiency Improvement and Mechanism Study 紫外线辅助动态隔膜电催化系统降解罗丹明 B：效率改进与机理研究

IF 2.7 4区化学

Electrocatalysis Pub Date : 2023-12-23 DOI: 10.1007/s12678-023-00862-7

Fuchen Ban, Chenjian Ye, Haipei Wang, Guozheng Li, Tongzhou Gao, Yu Wei, Ao Xiao

{"title":"Degradation of Rhodamine B by UV-Assisted Dynamic Diaphragm Electrocatalytic System: Efficiency Improvement and Mechanism Study","authors":"Fuchen Ban, Chenjian Ye, Haipei Wang, Guozheng Li, Tongzhou Gao, Yu Wei, Ao Xiao","doi":"10.1007/s12678-023-00862-7","DOIUrl":"10.1007/s12678-023-00862-7","url":null,"abstract":"<div><p>The problem of water shortage is becoming increasingly serious. Looking for efficient and environmentally friendly water treatment technology has become the focus of today’s municipal engineering field. The ultraviolet-assisted electrocatalytic system is considered to be a new and efficient process. In this study, ultraviolet radiation was introduced into the self-made double-chamber dynamic diaphragm system electrolytic cell, and the synergistic effect of electrocatalytic reaction and ultraviolet radiation was used to achieve efficient degradation of rhodamine B. The effects of initial concentration, electrolytic voltage, and electrolyte concentration on the degradation efficiency were further studied. The optimal conditions were established by statistical methods such as the response surface method. After 60 min, the decolorization rate of rhodamine B in the positive and negative chambers of the electrolytic cell reached more than 98%. In addition, the intermediate products in the degradation process were analyzed by LC-MS to explore the degradation mechanism of rhodamine B. The experimental results show that the UV-assisted electrocatalytic membrane system process has potential in the field of water treatment and provides a new and efficient treatment scheme for solving the problem of water shortage.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 1","pages":"128 - 142"},"PeriodicalIF":2.7,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139025558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Enhanced Photoanodic Activity and Outermost Surface Crystallinity of Tungsten Oxide via High-temperature Sintering 通过高温烧结提高氧化钨的光阳极活性和最外层表面结晶度

IF 2.7 4区化学

Electrocatalysis Pub Date : 2023-12-20 DOI: 10.1007/s12678-023-00859-2

Toshiyuki Abe, Hideya Tsuchikado, Mitsuharu Chisaka, Takashi Itoh, Guoqing Guan, Abuliti Abudula

{"title":"Enhanced Photoanodic Activity and Outermost Surface Crystallinity of Tungsten Oxide via High-temperature Sintering","authors":"Toshiyuki Abe, Hideya Tsuchikado, Mitsuharu Chisaka, Takashi Itoh, Guoqing Guan, Abuliti Abudula","doi":"10.1007/s12678-023-00859-2","DOIUrl":"10.1007/s12678-023-00859-2","url":null,"abstract":"<div><p>Tungsten oxide (WO<sub>3</sub>) is a promising photoanode material capable of water oxidation under visible-light irradiation. Although WO<sub>3</sub> is usually prepared via sintering at 500 °C–550˚C, this work shows that high-temperature sintering (i.e., at 600 °C) can lead to efficient output at the WO<sub>3</sub> photoanode. The material characteristics such as the crystal system, surface structure, film thickness, and optical properties were essentially independent of the sintering temperatures employed. However, the high-temperature-sintered WO<sub>3</sub> showed low charge transfer resistance at the electrode–electrolyte interface, resulting in improved charge injection efficiency for water oxidation at the WO<sub>3</sub> photoanode. WO<sub>3</sub> sintered at 550 °C and 600 °C showed the similar visible Raman spectra with strong band intensities, indicative of improved crystallinity in WO<sub>3</sub> bulk particularly in the comparison with WO<sub>3</sub> sintered at 450 °C. However, the ultraviolet Raman spectrum exhibited intense bands for only the WO<sub>3</sub> prepared at 600 °C, indicating the enhanced crystallization of the WO<sub>3</sub> outermost surface. Thus, the high crystallinity in the WO<sub>3</sub> bulk and at its surface results in efficient photoanodic output owing to the suppression of electron–hole recombination.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 1","pages":"120 - 127"},"PeriodicalIF":2.7,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138821542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Sensing Platform Based on Ni/Mn Bimetal-Organic Framework for Electrochemical Detection of Osimertinib 基于镍/锰双金属有机框架的传感平台用于奥希替尼的电化学检测

IF 2.7 4区化学

Electrocatalysis Pub Date : 2023-12-07 DOI: 10.1007/s12678-023-00857-4

Zahra Mirzaei Karazan, Mahmoud Roushani

{"title":"A Sensing Platform Based on Ni/Mn Bimetal-Organic Framework for Electrochemical Detection of Osimertinib","authors":"Zahra Mirzaei Karazan, Mahmoud Roushani","doi":"10.1007/s12678-023-00857-4","DOIUrl":"10.1007/s12678-023-00857-4","url":null,"abstract":"<div><p>In this study, the synthesis and properties of a selective electrochemical sensor for the determination of osimertinib (OSIM) as an anticancer drug using the bimetal-organic framework (MOF) were reported. Herein, MOF based on nickel/manganese (Ni/Mn-MOFs) was successfully created using the solvothermal method and applied for the amperometric detection of OSIM. Then, Ni/Mn-MOF was analyzed through a field emission scanning electron microscope (FE-SEM) and X-ray diffraction (XRD). The electrocatalytic performance of the introduced MOF is used in the electrochemical determination of the OSIM drug. The synthesized MOF leads to a noticeable improvement in the electrochemical performance which is ascribed to the many electrocatalytic sites, wide electrode–electrolyte contact area, and excellent electrical conductivity. This is the first study on the use of Ni/Mn-MOF to detect of OSIM. The Ni/Mn-MOF modified glassy carbon electrode (Ni/Mn-MOF/GCE) exhibited a good linear range from 0.5 to 800 μM and 800 to 1800 μM with a low detection limit (LOD) as 0.16 μM. In addition, the proposed sensor possessed good anti-interference properties, repeatability, stability, and reproducibility. The mentioned substrate to detect OSIM in the samples of blood serum was successfully applied. This research displays that MOFs are reliable materials for designing effective electrochemical sensors to detect drugs easily. The existing research results provide insights into the promotion and development of the bimetal-organic framework in the field of electrochemical applications and promising for usage in other electrochemical studies.</p></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 1","pages":"110 - 119"},"PeriodicalIF":2.7,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138545203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Correction to: Pt‑modified Fe3O4 Supported on Ni Foam Nanocomposite for Electrocatalytic Nitrate Reduction to Ammonia 更正为以镍泡沫纳米复合材料为支撑的铂改性 Fe3O4 电催化硝酸盐还原氨的研究

IF 2.7 4区化学

Electrocatalysis Pub Date : 2023-12-04 DOI: 10.1007/s12678-023-00858-3

Sajid Mahmood, Osamah Alduhaish, Muhammad Ammar, Shahid Khan, Niaz Ahmad, Ghulam Abbas Ashraf, Noshin Afshan, Noor Hassan

引用次数: 0

Electrochemical Activity of Carbon-Supported Pt-Nanoparticles: Effect of Pt-Precursor Ligand and/or Presence of Anions During Polyol Synthesis 碳负载的pt纳米颗粒的电化学活性:pt前体配体和/或阴离子在多元醇合成过程中的影响

IF 2.7 4区化学

Electrocatalysis Pub Date : 2023-11-30 DOI: 10.1007/s12678-023-00856-5

Kristian Juul Omann, Raghunandan Sharma, Shuang Ma Andersen

{"title":"Electrochemical Activity of Carbon-Supported Pt-Nanoparticles: Effect of Pt-Precursor Ligand and/or Presence of Anions During Polyol Synthesis","authors":"Kristian Juul Omann, Raghunandan Sharma, Shuang Ma Andersen","doi":"10.1007/s12678-023-00856-5","DOIUrl":"10.1007/s12678-023-00856-5","url":null,"abstract":"<div><p>This study revisits the impacts of the presence of OH<sup>−</sup> and Cl<sup>−</sup> anions and/or different forms of Pt precursors during polyol synthesis of carbon-supported electrocatalysts. Efficiency of the synthesis process in terms of the %conversion of a Pt complex to Pt metal has been quantified. It is observed that Pt precursors based on [PtCl<sub>6</sub>]<sup>2−</sup> are reduced easily compared to those based on [Pt(OH)<sub>6</sub>]<sup>2−</sup>. Furthermore, presence of excess Cl<sup>−</sup> during synthesis results in decreased %conversion and reduced ECSA, which is opposite from other reported work synthesized at higher temperature and pure solvents. For Pt/C synthesis under mild conditions, 100 °C and 30 vol% EG in water as solvent, presence of OH<sup>−</sup> during synthesis decreases the ECSA and hence increases the Pt nanoparticle size and change of catalyst surface structure. Finally, a method to get insights into the surface structure of Pt-nanoparticles through analysis of the H-adsorption/H-desorption peaks has been proposed.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 1","pages":"96 - 109"},"PeriodicalIF":2.7,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12678-023-00856-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138531546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Dual-Atomic Porphyry Molecular Systems as Efficient Electrocatalysts for N2 Reduction Reaction: a Theoretical Investigation 双原子斑岩分子体系作为N2还原反应高效电催化剂的理论研究

IF 2.7 4区化学

Electrocatalysis Pub Date : 2023-11-21 DOI: 10.1007/s12678-023-00855-6

Anuj Kuma, Ram K. Gupta, Nangan Senthilkumar, Bidhan Pandit, Abdullah M. Al-Enizi, Mohd Ubaidullah

{"title":"Dual-Atomic Porphyry Molecular Systems as Efficient Electrocatalysts for N2 Reduction Reaction: a Theoretical Investigation","authors":"Anuj Kuma, Ram K. Gupta, Nangan Senthilkumar, Bidhan Pandit, Abdullah M. Al-Enizi, Mohd Ubaidullah","doi":"10.1007/s12678-023-00855-6","DOIUrl":"10.1007/s12678-023-00855-6","url":null,"abstract":"<div><p>Metallo-porphyry-based frameworks have been utilized to construct single-atom catalysts (SACs), but their use in the fabrication of dual-atom catalysts (DACs) for the nitrogen reduction reaction (NRR) electrocatalytically is limited. Herein, a binuclear phthalocyanine (bN-Pc) was assessed based on a theoretical model to construct dual-atom systems (MoMo-bN-Pc, WW-bN-Pc, and MoW-bN-Pc) along with NRR activity and respective mechanisms, exploiting density functional theory (DFT) calculations. A cis-bridged N<sub>2</sub>-adduct, with N-atoms coordinating on both sides, resulted in these dual-atom systems, keeping adjacent metals in close proximity. Gibbs free energy studies revealed that the potential-determining step (PDS) for these catalysts appeared to be the protonation of adsorbed N<sub>2</sub> on dual-atom sites (*N<sub>2</sub>H). Following the enzymatic pathway, MoW-bN-Pc had the lowest limiting potential (− 0.32 V) than other systems, indicating its higher NRR activity. The synergistic orbital coupling between Mo(4d) and W(5d) due to their intimate proximity significantly raised the energy of the highest occupied molecular orbital of Mo to facilitate the electron donation to the antibonding orbital of N<sub>2</sub>, endowing the NRR of MoW-bN-Pc as compared to other systems. This work is sure to create interest for future studies on the construction of DAC-based active sites using molecular models.</p></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 1","pages":"87 - 95"},"PeriodicalIF":2.7,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138542070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Electrochemical Deposition of Pt and Pd on TiO2 Nanotubes for Application in the Photoelectrocatalytic Conversion of Biomethane and Biogas for Hydrogen Generation Pt和Pd在TiO2纳米管上的电化学沉积及其在生物甲烷和沼气光电催化转化制氢中的应用

IF 2.7 4区化学

Electrocatalysis Pub Date : 2023-11-16 DOI: 10.1007/s12678-023-00854-7

Laís Bresciani, Simone Stülp

{"title":"Electrochemical Deposition of Pt and Pd on TiO2 Nanotubes for Application in the Photoelectrocatalytic Conversion of Biomethane and Biogas for Hydrogen Generation","authors":"Laís Bresciani, Simone Stülp","doi":"10.1007/s12678-023-00854-7","DOIUrl":"10.1007/s12678-023-00854-7","url":null,"abstract":"<div><p>The photoelectrocatalytic conversion of biomethane/biogas using semiconductor materials is a promising method for production of green H<sub>2</sub>, the fuel of the future. In this work, TiO<sub>2</sub> nanotubes (TiO<sub>2</sub>NTs) prepared by electrochemical anodization were modified with Pt and Pd nanoparticles by electrochemical deposition using cyclic voltammetry, producing TiO<sub>2</sub>NTs/Pt and TiO<sub>2</sub>NTs/Pd catalysts, respectively. Evaluation of the morphology, composition, and crystallinity of the materials employed scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. The photoactivities of the electrodes were studied using linear scanning voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. The introduction of Pt and Pd on the TiO<sub>2</sub>NTs resulted in electrodes that presented excellent photogenerated charge separation and transfer properties. In the presence of methane, the current densities obtained increased further, by around 2.23- and 2.95-fold for the TiO<sub>2</sub>NTs/Pt and TiO<sub>2</sub>NTs/Pd electrodes, respectively, compared to the pure TiO<sub>2</sub>NTs, confirming the capacity of CH<sub>4</sub> to act as a hole scavenger. The maximum amounts of H<sub>2</sub> obtained from the photoelectrocatalytic conversion of methane were 120.7, 304.7, and 393 mmol.cm<sup>−2</sup> for the TiO<sub>2</sub>NTs, TiO<sub>2</sub>NTs/Pt, and TiO<sub>2</sub>NTs/Pd electrodes, respectively, clearly showing the positive contribution of the metallic nanoparticles electrodeposited on the TiO<sub>2</sub>NTs surface. A lower amount of H<sub>2</sub> was produced in the photoelectrocatalytic conversion of biogas, with the possible occurrence of additional reactions, such as the reduction of CO<sub>2</sub>.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 1","pages":"70 - 86"},"PeriodicalIF":2.7,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138531538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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