A porous nickel cyclotetraphosphate nanosheet as a new acid-stable electrocatalyst for efficient hydrogen evolution. Issue 21 (23rd May 2018)

• Record Type: Journal Article
• Authors: Liu, Xiong; Wen, Bo; Guo, Ruiting; Meng, Jiashen; Liu, Ziang; Yang, Wei; Niu, Chaojiang; Li, Qi; Mai, Liqiang
• Is Part Of: Nanoscale. Volume 10:Issue 21(2018)
• Page Start: 9856
• Page End: 9861
• Publication Date: 2018-05-23
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c8nr02436g
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : The porous nickel cyclotetraphosphate nanosheet arrays exhibit both high HER activity and catalytic stability in acid. Abstract : The stability of non-precious metal-based electrocatalysts for the acidic hydrogen evolution reaction (HER) is of great importance. Here, we have used nickel cyclotetraphosphate (Ni2 P4 O12 ) nanosheet arrays as a HER electrocatalyst for the first time. The Ni2 P4 O12 arrays were obtained through a facile low-temperature phosphorylation process and possess superior HER catalytic activities and stability in acid. The Ni2 P4 O12 delivers a small overpotential of 131.8 mV at −10 mA cm −2 and a low Tafel slope of 47.8 mV dec −1 in 0.5 M H2 SO4, comparable to most of the non-precious metal-based catalysts. Importantly, the Ni2 P4 O12 shows a negligible potential change (6.5 mV) over 80 000 s continuous testing in acid. The remarkable catalytic performances of Ni2 P4 O12 are mainly attributed to the inductive effect of P4 O12 4− and its polymer-like structure, promoting it as a potential acid-stable HER electrocatalyst.