催化作用
星团(航天器)
电催化剂
Atom(片上系统)
氢原子
化学
活动站点
燃料电池
纳米技术
材料科学
组合化学
光化学
化学工程
电化学
物理化学
有机化学
计算机科学
电极
群(周期表)
工程类
嵌入式系统
程序设计语言
作者
Yong‐Chao Zhang,Ming‐Hui Zhao,Jian Wu,Yingnan Wang,Lufan Zheng,Fangwei Gu,Ji‐Jun Zou,Jian Gao,Xiaodong Zhu
标识
DOI:10.1021/acscatal.4c01133
摘要
The design of efficient catalysts that synergistically promote *H2O decomposition, H2 formation, and desorption is critical to accelerate hydrogen evolution reaction (HER) kinetics but remains a significant challenge. Herein, we design an efficient catalyst of Pt/FeOOH@NiFe LDHs with Pt single-atom and cluster distribution induced by amorphous FeOOH. The Pt/FeOOH@NiFe LDHs with a low Pt content of 2 wt % exhibit ultralow HER overpotentials of 20 and 85 mV in alkaline media (5 and 40 mV in acidic media) to achieve the current densities of 10 and 100 mA cm–2. The overpotentials of specific activity normalized by the electrochemically active surfaces (ECSA) are 100 mV@0.2 mA cmECSA–2 and 140 mV@0.4 mA cmECSA–2. The Tafel slope is 51 mV dec–1, and the HER process follows the Volmer-Hyrovsky mechanism. Moreover, the overall water splitting requires only low voltages of 1.46 V@10 mA cm–2 and 1.61 V@100 mA cm–2, which are better than most reported catalysts. Experimental and theoretical studies show that the amorphous FeOOH can induce the formation of Pt single-atom and cluster with electron redistribution, and the formed Pt single-atom and cluster/FeOOH synergistic active sites exhibit superior HER performance. The amorphous FeOOH in Pt/FeOOH@NiFe LDHs facilitates the adsorption and activation of H2O, and the Pt single-atom and cluster play a key role in the formation and desorption of H2, synergistically accelerating the HER kinetics.
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