析氧
双功能
分解水
材料科学
电解
异质结
电极
电催化剂
电解水
化学工程
纳米技术
催化作用
光电子学
电化学
化学
物理化学
光催化
生物化学
电解质
工程类
作者
Xin Xiao,Dekang Huang,Yongqing Fu,Ming Wen,Xingxing Jiang,Xiaowei Lv,Man Li,Lin Gao,Shuangshuang Liu,Mingkui Wang,Chuan Zhao,Yan Shen
标识
DOI:10.1021/acsami.7b16430
摘要
Developing high-active and low-cost bifunctional materials for catalyzing the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) holds a pivotal role in water splitting. Therefore, we present a new strategy to form NiS/Ni2P heterostructures. The as-obtained NiS/Ni2P/carbon cloth (CC) requires overpotentials of 111 mV for the HER and 265 mV for the OER to reach a current density of 20 mA cm-2, outperforming their counterparts such as NiS and Ni2P under the same conditions. Additionally, the NiS/Ni2P/CC electrode requires a 1.67 V cell voltage to deliver 10 mA cm-2 in a two-electrode electrolysis system, which is comparable to the cell using the benchmark Pt/C||RuO2 electrode. Detailed characterizations reveal that strong electronic interactions between NiS and Ni2P, abundant active sites, and smaller charge-transfer resistance contribute to the improved HER and OER activity.
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