Facile Hydrothermal Synthesis of Highly Efficient and Durable Ternary PtPdCu Electrocatalysts for the Methanol Oxidation Reaction

Tian, Gui-XianChina Three Gorges Univ, Coll Mat & Chem Engn, Yichang 443002, Peoples R China. (författare)

QC 20230922
Precious metal Pt-based electrocatalysts have been widely used in the methanol catalytic oxidation anodes in direct methanol fuel cells. However, decreasing their cost and improving their efficiency and durability have still been challenging. Herein, ternary PtPdCu nanocatalysts are synthesized through a facile one-step hydrothermal synthesis method. When KI is present with a suitable amount in the synthesis, PtPdCu nanospheres with surface-embedded CuI clusters (CuI/PtPdCu) are fabricated. However, without KI, the prepared PtPdCu catalysts show a distinct hollow structure (h-PtPtCu). CuI/PtPdCu displays the highest specific activity with enhancement 4 times higher than commercial Pt/C for the methanol oxidation reaction in an alkaline medium. The superior activity can be attributed to two aspects: 1) the electronic effect originating from the highly alloyed PtPdCu; 2) the synergetic effect resulting from surface inlaid CuI clusters, which can promote the CO intermediate removal. Furthermore, because of the stable Pt-Pd-rich surface and its special linked hollow structure, the h-PtPtCu catalyst exhibits good durability with only a 3.6% decay in the specific activity.

Yang, YiKTH,Tillämpad fysikalisk kemi,Beijing Huairou Lab, Beijing 101400, Peoples R China.(Swepub:kth)u1lz09yo (författare)
Zhang, Rong-HuaChina Three Gorges Univ, Coll Mat & Chem Engn, Yichang 443002, Peoples R China. (författare)
Yan, Luo-YiChina Three Gorges Univ, Coll Mat & Chem Engn, Yichang 443002, Peoples R China. (författare)
Cheng, ZhengChina Three Gorges Univ, Coll Mat & Chem Engn, Yichang 443002, Peoples R China. (författare)
Lin, Dong-HaiShanghai Polytech Univ, Sch Energy & Mat, Shanghai Engn Res Ctr Adv Thermal Funct Mat, Shanghai Key Lab Engn Mat Applicat & Evaluat, Shanghai 201209, Peoples R China. (författare)
Zhou, Xin-WenChina Three Gorges Univ, Coll Mat & Chem Engn, Yichang 443002, Peoples R China. (författare)
China Three Gorges Univ, Coll Mat & Chem Engn, Yichang 443002, Peoples R China.Tillämpad fysikalisk kemi (creator_code:org_t)

Av författaren/redakt...: Tian, Gui-Xian; Yang, Yi; Zhang, Rong-Hua; Yan, Luo-Yi; Cheng, Zheng; Lin, Dong-Hai; visa fler...; Zhou, Xin-Wen; visa färre...

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