电催化剂
分解水
材料科学
磷化物
析氧
电解
电化学
化学工程
碱性水电解
氧化钴
电解水
无机化学
催化作用
钴
氧化物
纳米技术
电极
金属
化学
光催化
冶金
物理化学
电解质
工程类
生物化学
作者
Gyu Yong Jang,Sungsoon Kim,Ja-Yeon Choi,Jeong Hwan Park,Soyeon An,Jihyun Baek,Yuzhe Li,Teng Liu,Eugene Kim,Jung Hwan Lee,Haotian Wang,Min-Joong Kim,Hyun‐Seok Cho,Xiaolin Zheng,Jong Suk Yoo,Kwanyong Seo,Jae Hyung Park
标识
DOI:10.1002/aenm.202303924
摘要
Abstract Alkaline water splitting electrocatalysts have been studied for decades; however, many difficulties remain for commercialization, such as sluggish hydrogen evolution reaction (HER) kinetics and poor catalytic stability. Herein, by mimicking the bulk‐heterojunction morphology of conventional organic solar cells, a uniform 10 nm scale nanocube is reported that consists of subnanometer‐scale heterointerfaces between transition metal phosphides and oxides, which serves as an alkaline water splitting electrocatalyst; showing great performance and stability toward HER and oxygen evolution reaction (OER). Interestingly, the nanocube electrocatalyst reveals acid/alkaline independency from the synergistic effect of electrochemical HER (cobalt phosphide) and thermochemical water dissociation (cobalt oxide). From the spray coating process, nanocube electrocatalyst spreads uniformly on large scale (≈6.6 × 5.6 cm 2 ) and is applied to alkaline water electrolyzers, stably delivering 600 mA cm −2 current for >100 h. The photovoltaic‐electrochemical (PV‐EC) system, including silicon PV cells, achieves 11.5% solar‐to‐hydrogen (STH) efficiency stably for >100 h.
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