Fe(III) doped NiS2 nanosheet: a highly efficient and low-cost hydrogen evolution catalyst
Fe(III) doped NiS2 nanosheet: a highly efficient and low-cost hydrogen evolution catalyst
复制标题
Fe(III) 掺杂 NiS2 纳米片：高效、低成本的析氢催化剂
DOI：
10.1039/c6ta11041j
复制
发表时间：
2017-05
影响因子：
11.9
通讯作者：
Liu Shengzhong
中科院分区：
文献类型：
--
作者：
Yan Junqing;Wu Huan;Li Ping;Chen Hong;Jiang Ruibin;Liu Shengzhong
电催化/光催化分解水可持续制氢被广泛认为是最有前途的能源载体，引起了广泛关注。然而，相当大的析氢反应（HER）总是涉及稀有贵金属。在此，我们报道了一种新的HER候选者，Fe掺杂的NiS 2（Fe-NiS 2）纳米片，具有高活性和电化学稳定性的性能。选择Ni（OH）_2在温和的煅烧温度下硫化形成Fe-NiS_2。理论和实验结果表明，Fe ~（3+）掺杂到NiS_2（002）面的表面晶格中降低了H_2生成的活化能。合成的Fe-NiS 2样品显示出良好的电催化HER性能，具有37 mV dec−1的低塔菲尔斜率和10 mA cm−2下121 mV的小过电位。此外，Fe-NiS 2在反应1100 min后具有相当大的稳定性，HER值l的损失可以忽略不计。Fe-NiS 2样品也原位负载到CdS纳米棒的表面上，作为光催化产氢的助催化剂，在可见光下的析氢结果为3.2 mmol h-1 g-1，比裸CdS高46倍。这项工作可以帮助我们设计新的电催化剂分解水，它也提供了一个很好的理解析氢途径。
Sustainable hydrogen generation via electrocatalytic/photocatalytic water splitting has been widely regarded as the most promising energy carrier and has attracted extensive attention. However, a considerable hydrogen evolution reaction (HER) always involves the rare noble metals. Herein, we report a new HER candidate, an Fe-doped NiS2 (Fe–NiS2) nanosheet, with the performance of high activity and electrochemical stability. We chose the sulfidation of Ni(OH)2 under mild calcinated temperature for Fe–NiS2 formation. The theoretical and experimental results suggest that the Fe3+ doping into the surface lattice of the NiS2 (002) facet lowers the activation energy of H2 generation. The synthesized Fe–NiS2 sample shows good electrocatalytic HER performance with a low Tafel slope of 37 mV dec−1 and a small overpotential of 121 mV at 10 mA cm−2. Moreover, Fe–NiS2 gives considerable stability with a negligible loss of HER value l after a reaction of 1100 min. The Fe–NiS2 sample is also in situ loaded onto the surface of CdS nanorods to act as a co-catalyst for photocatalytic H2 generation with the result of 3.2 mmol h−1 g−1 hydrogen evolution under visible light, 46 times higher than with bare CdS. This work can help us to design new electrocatalysts for water splitting; it also provides a good understanding of the hydrogen evolution pathway.
登录
查看更多内容
影响因子：
4.5
作者：
H. Tributsch;J. C. Bennett
通讯作者：
H. Tributsch;J. C. Bennett
影响因子：
15
作者：
Dasgupta, Neil P.;Liu, Chong;Yang, Peidong
通讯作者：
Yang, Peidong
影响因子：
7.2
作者：
Tang, Chun;Pu, Zonghua;Sun, Xuping
通讯作者：
Sun, Xuping
影响因子：
15
作者：
Li, Yanguang;Wang, Hailiang;Dai, Hongjie
通讯作者：
Dai, Hongjie
影响因子：
6.6
作者：
Tang, Chun;Pu, Zonghua;Sun, Xuping
通讯作者：
Sun, Xuping