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Yuan X, Min Y, Wu J, Xu L, Yue W. Optimized electrocatalytic performance of PtZn intermetallic nanoparticles for methanol oxidation by designing catalyst support and fine-tuning surface composition. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Peng K, Zhang W, Bhuvanendran N, Ma Q, Xu Q, Xing L, Khotseng L, Su H. Pt-based (Zn, Cu) nanodendrites with enhanced catalytic efficiency and durability toward methanol electro-oxidation via trace Ir-doping engineering. J Colloid Interface Sci 2021; 598:126-135. [PMID: 33895534 DOI: 10.1016/j.jcis.2021.04.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 04/01/2021] [Accepted: 04/05/2021] [Indexed: 11/29/2022]
Abstract
Pt-based alloy nanomaterials with nanodendrites (NDs) structures are efficient electrocatalysts for methanol oxidation reaction (MOR), however their durability is greatly limited by the issue of transition metals dissolution. In this work, a facile trace Ir-doping strategy was proposed to fabricate Ir-PtZn and Ir-PtCu alloy NDs catalysts in aqueous medium, which significantly improved the electrocatalytic activity and durability for MOR. The as-prepared Ir-PtZn/Cu NDs catalysts showed distinct dendrites structures with the averaged diameter of 4.1 nm, and trace Ir doping subsequently improved the utilization of Pt atoms and promoted the oxidation efficiency of methanol. The electrochemical characterizations further demonstrated that the obtained Ir-PtZn/Cu NDs possessed enhanced mass activities of nearly 1.23 and 1.28-fold higher than those of undoped PtZn and PtCu, and approximately 2.35 and 2.67-fold higher than that of Pt/C in acid medium. More excitingly, after long-term durability test, the proposed Ir-PtZn and Ir-PtCu NDs still retained about 88.9% and 91.6% of its initial mass activities, which further highlights the key role of Ir-doping in determining catalyst performance. This work suggests that trace Ir-doping engineering could be a promising way to develop advanced electrocatalysts toward MOR for direct methanol fuel cell (DMFC) applications.
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Affiliation(s)
- Kai Peng
- Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China
| | - Weiqi Zhang
- Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China
| | | | - Qiang Ma
- Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China
| | - Qian Xu
- Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China
| | - Lei Xing
- Institute of Green Chemistry and Chemical Technology, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China
| | - Lindiwe Khotseng
- Department of Chemistry, University of the Western Cape, Robert Sobukwe Road, Cape Town 7535, South Africa
| | - Huaneng Su
- Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
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Wang Y, Hu ZP, Lv X, Chen L, Yuan ZY. Ultrasmall PtZn bimetallic nanoclusters encapsulated in silicalite-1 zeolite with superior performance for propane dehydrogenation. J Catal 2020. [DOI: 10.1016/j.jcat.2020.02.019] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cyril PH, Saravanan G. Development of advanced materials for cleaner energy generation through fuel cells. NEW J CHEM 2020. [DOI: 10.1039/d0nj03746j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The use of fuel cells in the transportation sector holds promise as a sustainable option for the generation of cleaner energy along with cumulative lesser GHG emissions.
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Affiliation(s)
- Priscilla Hyacinth Cyril
- Chennai Zonal Centre, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), CSIR-Madras Complex
- Chennai-600 113
- India
| | - Govindachetty Saravanan
- Chennai Zonal Centre, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), CSIR-Madras Complex
- Chennai-600 113
- India
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