Optimizing hydrogen adsorption of Ni B cocatalyst by integrating P atom for enhanced photocatalytic H2-production activity of CdS
Optimizing hydrogen adsorption of Ni B cocatalyst by integrating P atom for enhanced photocatalytic H2-production activity of CdS
复制标题
通过整合P原子优化Ni B助催化剂的氢吸附以增强CdS的光催化产氢活性
DOI：
10.1016/j.apsusc.2022.154457
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发表时间：
2022-08
期刊：
影响因子：
--
通讯作者：
Huogen Yu
中科院分区：
文献类型：
--
作者：
Haoyu Long;Ping Wang;Xuefei Wang;Feng Chen;Huogen Yu
• P is introduced into Ni x B to optimize the electron density of Ni active site. • Ni x PB cocatalyst is uniformly coupled with rGO/CdS via a chemical reduction route. • Ni x PB-rGO/CdS shows higher H 2 -evolution rate (5.79 mmol g -1 h -1 ) than Ni x B-rGO/CdS. • A mechanism of introducing P into Ni x B to promote H adsorption of Ni is proposed. Developing low-cost and long-lasting nickel boride (Ni x B) for hydrogen evolution reaction is desirable to favor the present renewable energy system. However, H atom adsorption on Ni active site is weakened by the electron transfer from B to Ni atom in Ni x B, causing the inhibited hydrogen-evolution process. Herein, the metalloid P is introduced into Ni x B to regulate the electron density of Ni active site, with the aim of enhancing its H atom adsorption to boost the photocatalytic H 2 -production activity of CdS. In this regard, the Ni x PB cocatalysts with a size of 8-10 nm are loaded on reduced graphene oxide (rGO) to produce Ni x PB-rGO cocatalyst, which was well coupled with CdS to prepare the Ni x PB-rGO/CdS photocatalyst. Photocatalytic hydrogen-evolution tests suggested that the Ni x PB-rGO/CdS photocatalyst displayed the highest H 2 -evolution rate of 5.79 mmol h -1 g -1 , which is 1.8 and 9.9 times over the Ni x B-rGO/CdS and rGO/CdS photocatalysts, respectively. The above improved activity of Ni x PB-rGO/CdS photocatalyst can be attributed to the promoting hydrogen adsorption of Ni atom for efficient interfacial H 2 production via the facile introduction of P heteroatom. This work provides a feasible strategy to optimize the transition metal borides cocatalysts for the photocatalytic H 2 evolution.
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影响因子：
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影响因子：
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