首页|Modulating reaction pathways of formic acid oxidation for optimized electrocatalytic performance of PtAu/CoNC

Modulating reaction pathways of formic acid oxidation for optimized electrocatalytic performance of PtAu/CoNC

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Formic acid oxidation(FAO)is a typical anode reaction in fuel cells that can be facilitated by modulating its direct and indirect reaction pathways.Herein,PtAu bimetallic nanoparticles loaded onto Co and N co-doping carbon nanoframes(CoNC NFs)were designed to improve the selectivity of the direct reaction pathway for efficient FAO.Based on these subtle nanomaterials,the influences of elemental composition and carbon-support materials on the two pathways of FAO were investigated in detail.The results of fuel cell tests verified that the appropriate amount of Au in PtAu/CoNC can promote a direct reaction pathway for FAO,which is crucial for enhancing the oxidation efficiency of formic acid.In particular,the obtained PtAu/CoNC with an optimal Pt/Au atomic ratio of 1∶1(PtAu/CoNC-3)manifests the best catalytic performance among the analogous obtained Pt-based electrocatalysts.The FAO mass activity of the PtAu/CoNC-3 sample reached 0.88 A·mgPt-1,which is 26.0 times higher than that of Pt/C.The results of first-principles calculation and CO stripping jointly demonstrate that the CO adsorption of PtAu/CoNC is considerably lower than that of Pt/CoNC and PtAu/C,which indicates that the synergistic effect of Pt,Au,and CoNC NFs is critical for the resistance of Pt to CO poisoning.This work is of great significance for a deeper understanding of the oxidation mechanism of formic acid and provides a feasible and promising strategy for enhancing the catalytic performance of the catalyst by improving the direct reaction pathway for FAO.

formic acid oxidationdirect oxidation pathwaymetal organic frameworkco-dopingCO binding energy

Mengchao Liang、Tianyu Xia、Han Gao、Kai Zhao、Tianqi Cao、Meng Deng、Xiaoyan Ren、Shunfang Li、Haizhong Guo、Rongming Wang

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Key Laboratory of Material Physics,Ministry of Education,School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450052,China

Collaborative Innovation Center of Light Manipulations and Applications,Shandong Normal University,Jinan,Shandong 250358,China

Beijing Advanced Innovation Center for Materials Genome Engineering,Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science,School of Mathematics and Physics,University of Science and Technology Beijing Beijing 100083,China

国家自然科学基金国家自然科学基金国家自然科学基金中国博士后科学基金program for the Innovation Team of Science and Technology in University of HenanExcellent Youth Foundation of Henan Scientific CommitteeCAS Interdisciplinary Innovation Team北京市自然科学基金Center of Advanced Analysis&Gene Sequencing of Zhengzhou University is acknowledged for providing characterization facilitieShanghai Synchrotron Radiation Facility (SSRF)is acknowledged for providing X-ray absorption near edge structure (XANES)test at

5180118812034002519710252018M63279220IRTSTHN014202300410356JCTD-2019-012204085

2022

纳米研究(英文版)

纳米研究(英文版)

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ISSN：
年,卷(期)：2022.15(2)
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