Abbas, Syed Asad Kim, Seong-Hoon Iqbal, Muhammad Ibrahim Muhammad, Shoaib Yoon, Won-Sub Jung, Kwang-Deog 2024-01-19T23:31:11Z 2024-01-19T23:31:11Z 2021-09-03 2018-02-14 2045-2322 https://pubs.kist.re.kr/handle/201004/121701 The design of active, stable, and cost-effective electrocatalysts for the H-2 evolution reaction (HER) in alkaline conditions is important for electrochemical systems such as the chloro-alkaline process and H-2 production. Here we report catalysts comprising Pt on Ni single crystalline spines (Pt/Ni-SP) with high activity and stability for HER in alkaline solution with proposed mechanism. The Pt/Ni-SP catalysts are prepared by dispersing platinum nanoparticles (1.7-3.1 nm) on the single-crystalline spines (Ni-SP) of Ni urchin-like particles. The size and coverage of Pt nanoparticles on Ni-SP are increased with increases in the Pt loading amount. X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy are performed to observe the structure of the Pt/Ni-SP catalyst. The catalysts achieve the mass activity of 1.11 A mg((Pt))(-1), comparing favorably to Pt/C catalysts with the mass activity of 0.33 A mg((Pt))(-1) at 0.05 V overpotential. The Tafel slope of the Pt/Ni-SP catalyst is approximately 30 mV dec(-1,) similar to that of Pt, while Pt/Ni-SP is very stable in alkaline solution, like Ni. The synergistic effect of Pt/Ni-SP is ascribed to H spillover from Pt to Ni. English NATURE PUBLISHING GROUP RAY-ABSORPTION SPECTROSCOPY FUEL-CELL CATALYSTS EVOLUTION REACTION ELECTROCATALYTIC PROPERTIES TRANSITION-METALS SURFACES DESIGN OXYGEN CR ADSORPTION Synergistic effect of nano-Pt and Ni spine for HER in alkaline solution: hydrogen spillover from nano-Pt to Ni spine Article 10.1038/s41598-018-21396-9 1 SCIENTIFIC REPORTS, v.8 SCIENTIFIC REPORTS 8 scie scopus 000424985800024 2-s2.0-85042080211 Multidisciplinary Sciences Science & Technology - Other Topics Article RAY-ABSORPTION SPECTROSCOPY FUEL-CELL CATALYSTS EVOLUTION REACTION ELECTROCATALYTIC PROPERTIES TRANSITION-METALS SURFACES DESIGN OXYGEN CR ADSORPTION HER Hydrogen Spillover Ni Spine