Pt/C electrocatalysts derived from recycled Pt/Re mixed solutions: synthesis, characterization, and electrochemical behaviour in fuel cells

被引：4

作者：

Cui, Jian ^{[1
]}

Yu, Fengshan ^{[1
]}

Tian, Maolin ^{[1
]}

Yan, Chengcheng ^{[1
]}

Shen, Tongjun ^{[1
]}

Wang, Xueli ^{[1
]}

Prova, Umme Hani ^{[1
]}

Wang, Chunxia ^{[1
]}

Huang, Guoyong ^{[1
]}

Xu, Shengming ^{[2
]}

机构：

[1] China Univ Petr, Coll New Energy & Mat, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China

[2] Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing Key Lab Fine Ceram, Beijing 100084, Peoples R China

来源：

GREEN CHEMISTRY | 2023年 / 25卷 / 22期

基金：

中国国家自然科学基金;

关键词：

REDUCTION; PLATINUM; CATALYSTS; NANOPARTICLES; EFFICIENT; RECOVERY; ALLOY;

D O I：

10.1039/d3gc02940a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Utilizing critical metals such as platinum (Pt) and rhenium (Re) recycled from spent catalysts in energy conversion systems is a strategy to solve the problems of metal resource scarcity. A microwave-assisted polyol reduction method was developed to convert H2PtCl6<middle dot>6H(2)O (containing Re) into high-purity Pt/C electrocatalysts, leaving a small amount of Re in solution for further recovery. PtCl62- can be selectively reduced to metallic Pt in an alkaline environment, whereas ReO4- cannot be reduced to metallic Re. Additionally, the optimum size distribution (2.03 nm) of Pt nanoparticles can be controlled by adjusting the molar ratio of NaOH to Pt. The M-50 electrocatalyst demonstrated mass and specific activities of 0.0890 A mg(Pt)(-1) and 0.0810 mA cm(-2), respectively, towards the oxygen reduction reaction. When employed in a membrane electrode assembly (MEA) test, the highest power density of 0.80 W cm(-2) was achieved, which was competitive with that of TANAKA 20 wt% commercial Pt/C electrocatalysts. This microwave-assisted polyol reduction can convert H2PtCl6<middle dot>6H(2)O (containing Re) into high-purity Pt/C electrocatalysts, which solves the problem of insufficient purity of secondary resources brought on by the challenge of in-depth separation of Pt and Re during the hydrometallurgical process. This process provides a new idea for recycling critical metals in an economical, sustainable, and affordable manner.

引用

页码：9209 / 9217

页数：9

共 53 条

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