Metal-organic frameworks stabilized Mo and W binary single-atom catalysts as high performance bifunctional electrocatalysts for water electrolysis

Chih Chieh Cheng, Ting Yu Lin, Yu Chieh Ting, Shin Hong Lin, Yong Man Choi, Shih Yuan Lu*

*此作品的通信作者

研究成果: Article同行評審

9 引文 斯高帕斯(Scopus)

摘要

Single atom catalysts (SACs) are commonly composed of single atoms (SAs) anchored on relatively inert supports containing surface heteroatoms, leading to low specific catalytic efficiency. A new SAC design strategy, anchoring SAs on catalytically active porous supports, was proposed and demonstrated with NiFe-based metal-organic frameworks (MOFs) stabilized Mo and W binary SACs, MOF-MoSAWSA, as highly efficient and stable bifunctional electrocatalysts for electrolytic water splitting. MOF-MoSAWSA delivered current densities of 10 and 500 mA cm−2 at ultralow overpotentials of 199 and 250 mV for oxygen evolution reaction and at decent overpotentials of 57 and 297 mV for hydrogen evolution reaction, respectively. For overall water splitting, the MOF-MoSAWSA//MOF-MoSAWSA couple achieved ultralow cell voltages of 1.501 and 1.780 V to deliver current densities of 10 and 500 mA cm−2, respectively, and exhibited excellent stability with only 2% decay in current densities after a 56-hour operation at an ultrahigh initial current density of 515 mA cm−2. The success was attributed to the positive synergy between the SAs and MOF and between Mo and W SAs, as revealed with X-ray absorption and photoelectron spectroscopic analyses. The present development offers a new route for fabrication of advanced SA based catalysts.
原文American English
文章編號108450
頁(從 - 到)108450
期刊Nano Energy
112
早期上線日期4月 2023
DOIs
出版狀態Published - 7月 2023

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