Effect of Acid Treatment on Electrocatalytic Performance of PtNi Catalyst

• Published in: Chemical research in Chinese universities Vol. 37; no. 3; pp. 686 - 695
• Main Authors: Guo, Ruihua, Qian, Fei, An, Shengli, Zhang, Jieyu, Chou, Kuo-chih, Ye, Jinyu, Zhou, Zhiyou
• Format: Journal Article
• Language: English
• Published: Changchun Jilin University and The Editorial Department of Chemical Research in Chinese Universities 01-06-2021; Springer Nature B.V
• Subjects: Analytical Chemistry; Catalysts; Catalytic oxidation; Chemical synthesis; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Current density; Electrochemical analysis; Ethanol; Graphene; Infrared spectroscopy; Inorganic Chemistry; Intermetallic compounds; Organic Chemistry; Oxidation; Particle size; Photoelectrons; Physical Chemistry; Spectrum analysis; Sulfuric acid; Toxicity; Workstations; X ray photoelectron spectroscopy; Acid treatment; Electrocatalytic oxidation; Particle size; Platinum; Graphene
• DOI: 10.1007/s40242-020-0207-y
• EISSN: 2210-3171
• ISSN: 1005-9040

I
n this paper, we describe the synthesis of the AC-PtNi/G catalysts with graphene as the carrier,
via
the alcohol reduction and the sulfuric acid treatment. The prepared catalysts were microscopically characterized by X-ray diffractometry(XRD), X-ray photoelectron spectroscopy(XPS), scanning electron microscopy(SEM), electron spectroscopy(EDAX), and transmission electron micros-copy(TEM). We tested the electrochemical performance of the prepared catalysts using an electrochemical workstation and
in situ
infrared spectroscopy(FTIR). The results showed that the acid-treated AC-PtNi/G catalysts had a more uniform dispersion and with the increased of treatment time, the particle size of the catalyst became smaller. And the electrocatalytic performance of the AC-PtNi/G-48h catalyst treated with sulfuric acid for 48 h was significantly better than that of the untreated PtNi/G catalyst. Its electrochemically active surface area was 76.63 m
2
/g, and the peak current density value for catalytic oxidation of ethanol was 1218.83 A/g, which was 10 times that of ordinary commercial Pt/C catalyst. The steady-state current density value of 1100 s was 358.77 A/g, and it has excellent anti-CO toxicity performance. It was determined that a sulfuric acid treatment controlled catalyst particle size and increased the electrocatalytic activity of the catalytic oxidation of ethanol.