Solar-assisted selective separation and recovery of precious group metals from deactivated air purification catalysts  

太阳能诱导选择性分离和回收失活空气净化催化剂中的贵金属

作　　者：Meijun Wu Yao Chen Zhenpeng Guo Xinru Wang Hanyun Zhang Ting Zhang Shuhui Guan Zhenfeng Bian 伍美军;陈瑶;国振鹏;王心茹;张涵云;张婷;关舒会;卞振锋

机构地区：[1]Ministry of Education Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials,Shanghai Normal University,Shanghai 200234,China [2]Department of Chemistry,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Fudan University,Shanghai 200438,China [3]Shanghai YK Pao School,Shanghai 201620,China

出　　处：《Science Bulletin》2024年第15期2379-2386,共8页科学通报（英文版）

基　　金：supported by the National Key Research and Development Program of China (2020YFA0211004);the National Natural Science Foundation of China (22176128 and 22236005);the Innovation Program of Shanghai Municipal Education Commission (2023ZKZD50);Program of Shanghai Academic Research Leader (21XD1422800);Shanghai Government (22dz1205400 and 23520711100);Chinese Education Ministry Key Laboratory and International Joint Laboratory on Resource Chemistry;Shanghai Eastern Scholar Program;the “111 Innovation and Talent Recruitment Base on Photochemical and Energy Materials” (D18020);Shanghai Engineering Research Center of Green Energy Chemical Engineering (18DZ2254200);Shanghai Frontiers Science Center of Biomimetic Catalysis。

摘　　要：The mitigation of environmental and energy crises could be advanced by reclaiming platinum group precious metals(PGMs) from decommissioned air purification catalysts. However, the complexity of catalyst composition and the high chemical inertness of PGMs significantly impede this process. Consequently,recovering PGMs from used industrial catalysts is crucial and challenging. This study delves into an environmentally friendly approach to selectively recover PGMs from commercial air purifiers using photocatalytic redox technology. Our investigation focuses on devising a comprehensive strategy for treating three-way catalysts employed in automotive exhaust treatment. By meticulously pretreating and modifying reaction conditions, we achieved noteworthy results, completely dissolving and separating rhodium(Rh), palladium(Pd), and platinum(Pt) within a 12-h time frame. Importantly, the solubility selectivity persists despite the remarkably similar physicochemical properties of Rh, Pd, and Pt. To bolster the environmental sustainability of our method, we harness sunlight as the energy source to activate the photocatalysts, facilitating the complete dissolution of precious metals under natural light irradiation. This ecofriendly recovery approach demonstrated on commercial air purifiers, exhibits promise for broader application to a diverse range of deactivated air purification catalysts, potentially enabling implementation on a large scale.

关 键 词：PHOTOCATALYSIS Air purification catalysts Platinum group precious metals Selective recovery 

分 类 号：TQ426[化学工程] TF83[冶金工程—有色金属冶金]