Surface-modulated palladium-nickel icosahedra as high-performance non-platinum oxygen reduction electrocatalysts

Feng, Yusheng; Shao, Qi; Ji, Yujin; Cui, Xiaoneng; Li, Youyong; Zhu, Xing; Huang, Xiaoqing

doi:10.1126/sciadv.aap8817

Cited by 105 publications

(53 citation statements)

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“…It is generally accepted that the atomic O adsorption energy EO* can be used to evaluate the ORR activity, and the optimal value of ΔEO* is ~0.2 eV weaker than the one for Pt(111) (5,31). EO* is modulated by the d-band center (labeled as ε d ) of Pt, while the downshift/upshift of ε d is tuned by surface lattice strain (noted as χ) and coordination environment (coordination number, noted as CN) (32)(33)(34). High-index crystal facets such as Pt(211) and Pt(311) exhibit a compressive lattice stain (χ) relative to Pt(111), which brings about a down-shift of ε d of surface Pt atoms and weakening of EO*.…”

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confidence: 99%

Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells

Tian

Zhao

et al. 2019

Science

1,210

787

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Development of efficient and robust electrocatalysts is critical for practical fuel cells. We report one-dimensional bunched platinum-nickel (Pt-Ni) alloy nanocages with a Pt-skin structure for the oxygen reduction reaction that display high mass activity (3.52 amperes per milligram platinum) and specific activity (5.16 milliamperes per square centimeter platinum), or nearly 17 and 14 times higher as compared with a commercial platinum on carbon (Pt/C) catalyst. The catalyst exhibits high stability with negligible activity decay after 50,000 cycles. Both the experimental results and theoretical calculations reveal the existence of fewer strongly bonded platinum-oxygen (Pt-O) sites induced by the strain and ligand effects. Moreover, the fuel cell assembled by this catalyst delivers a current density of 1.5 amperes per square centimeter at 0.6 volts and can operate steadily for at least 180 hours.

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confidence: 99%

Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells

Tian

Zhao

et al. 2019

Science

1,210

787

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“…In their later work, they successfully modulate the thickness of the interface in the PtPb nanodisks by changing the amount of the Pt precursor (Pt(acac) 2 ) (Figure c). In another example, by using the different reduction abilities of Pd and Ni, a Pd‐Ni core–shell structure with Pd as the core and the decorated Ni surface was obtained (Figure e,f) . In addition, an interesting interface can be formed in the Janus structure via the direct synthesis method, which is based on the different solid solubility of two metals.…”

Section: The Category Of Interfacial Engineered Bimetal Based Catalystsmentioning

confidence: 99%

Section: The Category Of Interfacial Engineered Bimetal Based Catalystsmentioning

confidence: 99%

“…The interfacial engineering of Pd based catalysts in recently years was prepared based on this guide. Our group studied the role of unique Pd/Ni interface in the ORR performance via constructing the Pd‐Ni core–shell icosahedra, where the Ni decorated on the Pd core surface with precise Pd/Ni ratios . The results demonstrated that the optimized interaction between the Pd core and the decorated Ni surface yields the highest ORR activity ( Figure a,b).…”

Section: Electrocatalysis Of Interfacial Engineered Bimetal Based Catmentioning

confidence: 99%

“…c,d) DFT simulations of the adsorption energy of adsorbed oxygen atom and the d‐band center shift of Pd x Ni (111) with different ratios of Ni. All panels reproduced with permission . Copyright 2018, American Association for the Advancement of Science.…”

Section: Electrocatalysis Of Interfacial Engineered Bimetal Based Catmentioning

confidence: 99%

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Opportunities and Challenges of Interface Engineering in Bimetallic Nanostructure for Enhanced Electrocatalysis

Shao

Wang

Huang

2018

Adv Funct Materials

Self Cite

269

127

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The development of bimetal based catalysts via interfacial engineered strategy has been intensively explored due to its great potential for enhancing the electrochemical performance. The significant progress achieved by the interfacial engineering is mainly derived from its great ability on tuning the intermediate adsorption, controlling the electron and mass transportation, preventing catalysts from serious aggregation, as well as providing advanced promoter for the rational design of highly efficient catalysts. Here, the recent works on the interfacial engineered strategy for developing highly efficient bimetal based electrocatalysts are outlined. The advantages of interfacial engineered strategy on manipulating the activity, selectivity, and stability of catalysts are first discussed. The recent synthetic approaches for controlling the interface structures and the related hydrogen evolution reaction, oxygen evolution reaction, oxygen reduction reaction, and electroreduction of carbon dioxide are elaborated based on three major categories, involving metal/metal, metal/metal compound, and metal/support interfaces. Challenges and perspectives of this field are represented in the final section.deeply investigated with the assistances of DFT calculation and advanced characterization technologies. [32][33][34] Nowadays, since the interfacial engineering of bimetal based catalysts has become a focus of the electrocatalysis with great achievements, we believe that summarizing the newly emerged interfacial engineered electrocatalysts with novel architectures is at most important for the future widespread applications of bimetal based catalysts. The constructed bimetal based catalysts and their derived interfaces are various, such as metal/metal interface, metal/organic interface, metal/sulfide interface, metal/boride interface, metal/hydroxide interface, metal/phosphide interface, and metal/oxide interface (Scheme 1). [35][36][37][38][39][40][41][42] All of these interfaces can be generally categorized into three major groups, based on the type of the interface: 1) metal/metal(alloy), 2) metal/metal compound, and 3) metal/support. The pathways that prepare these three kinds of interfaces can be grouped into two categories. One is the direct synthesis method and the other is the synthesis with post processing.The aim of this review is to build a bridge between the interfacial engineered bimetal based electrocatalysts and the novel electro-applications in order to develop catalysts with maximized performance. First of all, the roles of interfaces in improving the activity, selectivity and stability of electrocatalysis are illustrated. A deep understanding of the mechanism will be helpful to propose new pathways for the design of high-performance electrocatalysts. Then the synthetic methods for effectively constructing the metal/metal(alloy), metal/metal compound, and metal/support interfaces are introduced. The applications of interfacial engineered catalysts in the electrocatalysis, including oxygen reduction reaction (...

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Advances and Challenges in Pt‐free Pd‐based Catalysts for Oxygen Electro‐Reduction in Alkaline Media

Sahoo

Gautam

2022

Heterogeneous Nanocatalysis for Energy and Environmental Sustainability

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Surface-modulated palladium-nickel icosahedra as high-performance non-platinum oxygen reduction electrocatalysts

Abstract: High-performance oxygen reduction reaction electrocatalysis enabled by surface-modulated palladium-nickel icosahedra.

Cited by 105 publications

References 60 publications

Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells

Engineering bunched Pt-Ni alloy nanocages for efficient oxygen reduction in practical fuel cells

Opportunities and Challenges of Interface Engineering in Bimetallic Nanostructure for Enhanced Electrocatalysis

Advances and Challenges in Pt‐free Pd‐based Catalysts for Oxygen Electro‐Reduction in Alkaline Media

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