Electronically modulated nickel boron by CeOx doping as a highly efficient electrocatalyst towards overall water splitting. Issue 2 (15th December 2021)

• Record Type: Journal Article
• Authors: Wang, Huimin; Liu, Huixiang; Feng, Tao; Wang, Lincai; Yuan, Wenyi; Huang, Qing; Guo, Yanhui
• Is Part Of: Dalton transactions. Volume 51:Issue 2(2021)
• Page Start: 675
• Page End: 684
• Publication Date: 2021-12-15
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1dt03278j
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A novel CeO x -NiB@NF catalyst with high activity and good stability towards both the HER and OER has been fabricated. Abstract : Exploiting economic, efficient and durable non-noble metal electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is promising, but still faces enormous challenges. Herein, the strategy of doping a metal boride with a rare earth metal oxide has been explored to develop a highly efficient bifunctional electrocatalyst. The novel electrocatalyst CeO x -NiB consists of CeO x -doped NiB supported on nickel foam, and was fabricated by a one-step mild electroless plating reaction. Remarkably, the CeO x -NiB@NF electrode delivers a current density of 10 mA cm −2 at overpotentials of only 19 mV and 274 mV for the HER and OER, respectively. Two-electrode electrolyzers with the CeO x -NiB@NF electrode require only 1.424 V to deliver 10 mA cm −2 for overall water splitting in 1.0 M KOH, outperforming the Pt–C/NF∥IrO2 /NF electrolyzer. Meanwhile, the electrode also has good stability (can work for 100 hours at 10 mA cm −2 ) and industrial-grade current density. This work provides a new idea for the development of efficient and durable non-precious metal catalysts.