RhCu 3D Nanoframe as a Highly Active Electrocatalyst for Oxygen Evolution Reaction under Alkaline Condition

Park, Jongsik; Kim, Jongchan; Yang, Yoojin; Yoon, Donghwan; Baik, Hionsuck; Haam, Seungjoo; Yang, Haesik; Lee, Kwangyeol

doi:10.1002/advs.201500252

Cited by 50 publications

(48 citation statements)

References 51 publications

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“…Since Pd was much more susceptible to chemical oxidation than Rh, Rh cubic nanoframes were prepared through etching process based on the Fe III /Br − pair. This etching strategy is also applied in other Rh‐based hollow nanostructures such as Cu−Rh nanooctahedral frames, RhCu 3D nanoframes and Pd−Rh nanoboxes ,,. Epitaxial growth of highly ordered Rh island nanocrystals with a controlled size, orientation, surface structure and interface was realized by Sneed et al .…”

Section: Preparation Of Rh‐based Catalystsmentioning

confidence: 99%

Rh‐Based Nanocatalysts for Heterogeneous Reactions

Luo

Peng

et al. 2018

ChemNanoMat

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Rhodium (Rh) is well‐known for its catalytic application in diverse industrial reactions such as methane conversion, hydrogen generation, and olefin hydroformylation. Compared to homogeneous catalysts, heterogeneous Rh‐based nanocatalysts are facilely separated and collected after reactions, thus being more compatible for industrialization. To this end, the development of active and stable heterogeneous Rh‐based catalysts has received everlasting interest. In this review, we focus on the synthesis and catalytic application of Rh‐based nanocatalysts for heterogeneous catalysis. Recent efforts in the design and fabrication of Rh‐based nanocatalysts are highlighted. Various synthetic strategies and protocols for shape‐controlled synthesis of Rh‐based nanocrystals and supported Rh‐based nanocatalysts are overviewed. In addition, we introduce methane conversion, hydrogen generation, and olefin hydroformylation as three typical catalytic applications of the Rh‐based nanocatalysts, and provide insights into the catalytic mechanisms involved. The remaining challenges and future prospects for the Rh‐based heterogeneous nanocatalysts are also discussed. This review offers a guideline for future research on Rh‐based nanocatalysts for heterogeneous catalysis.

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Section: Preparation Of Rh‐based Catalystsmentioning

confidence: 99%

Rh‐Based Nanocatalysts for Heterogeneous Reactions

Luo

Peng

et al. 2018

ChemNanoMat

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“…Nevertheless, developing active and stable electrocatalysts that can drive both reactions concurrently with the lowest possible overpotentials, thereby making the overall water splitting process less energy‐intensive, is a particularly tough challenge. Most notably, the state‐of‐the‐art electrocatalysts for HER (Pt‐based materials) have restrained activity in OER, while the state‐of‐the‐art OER catalysts (Ir‐ and Ru‐based compounds) have poor HER efficiency . Therefore, a large number of low‐cost and earth‐abundant non‐noble materials have been developed in recent years as HER or OER electrocatalysts with greatly prospective electrocatalytic performances, such as transition metal oxides, hydroxides, carbon encapsulating metals for OER in alkaline medium, and transition metal sulfides, selenides, phosphides for HER in acidic medium .…”

Section: Bifunctional Electrocatalysts For Her and Oermentioning

confidence: 99%

“…The development of efficient bifunctional oxygen catalysts toward both ORR and OER has become a hotspot in this field. Nevertheless, the performance of ORR and OER is hindered by its slow kinetics and consequently demand a high overpotential to drive these electrochemical reactions . In addition, although Pt‐based catalysts are the best ORR catalysts, they are not effective for OER, due to the production of Pt oxides on the catalyst surface at high overpotentials, hindering their catalytic ability for OER .…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Bifunctional Redox Electrocatalysts

Kuang

Zheng

2016

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Electrocatalysts are playing a prominent role in the design of renewable energy devices. Benefiting from a long and prosperous history of synthesizing individual hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) electrocatalysts, the development of bifunctional ORR/OER or HER/OER electrocatalysts has recently emerged as a new research hotspot. In this review, a brief account of recent developments of bifunctional electrocatalysts for ORR/OER and HER/OER are introduced, aiming to provide insights into theoretical understanding of these reactions through analysis and comparison of various bifunctional electrocatalysts. The related reaction mechanisms and the associated activity descriptors for aforementioned reactions in the recent literatures are also presented. Different series of bifunctional electrocatalysts with much improved performances are discussed in detail and their design principles are outlined. Finally, the existing challenges and the future effort directions for enhancing the performance of bifunctional electrocatalysts are proposed.

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“…Additionally, to further reduce the cost of Ru electrocatalyst, the combination of Ru and non-noble metal is a direct approach to develop cheap and highly efficient catalysts for water splitting. [27,28] However, the choosing of nonprecious metal should meet the requirements of facilitating the transfer of electrons, increasing surface defects and surface area, and contributing to the growth of interface so that could validly boost the water splitting activity. [28][29][30] Fortunately, Cu, as a cheaper metal compared to noble metals, is an ideal candidate because it can display better conductivity than other transition metals.…”

Section: Introductionmentioning

confidence: 99%

Growth of Highly Active Amorphous RuCu Nanosheets on Cu Nanotubes for the Hydrogen Evolution Reaction in Wide pH Values

Cao

Wang

et al. 2020

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Rational design of low‐cost, highly efficient, and stable electrocatalysts for the hydrogen evolution reaction (HER) has attracted wide attention. Herein, 3D RuCu nanocrystals (NCs) are successfully synthesized by a facile wet chemistry method, in which amorphous RuCu nanosheets are directly grown on crystalline Cu nanotubes (NTs). Importantly, the obtained 3D RuCu NCs only need 18 and 73 mV to deliver the current density of 10 mA cm−2 for HER in alkaline and neutral media, respectively. Density functional theory calculations and experiments reveal that the Ru sites on the surface of amorphous nanosheets are the highly active centers for HER. Moreover, this catalyst can expose more surface area for water splitting compared to pure nanosheets because the unique 3D structure can effectively prevent the aggregation of nanosheets. Meanwhile, the interface between amorphous nanosheets and crystalline NTs is essential to boost the HER performance because the amorphous phase with many unsaturated bonds can facilitate adsorption of reactants and crystalline Cu with superior conductivity can promote the transfer of electrons. This work provides a facile method to prepare an original 3D Ru‐based electrocatalyst with highly active HER performance in wide pH values.

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RhCu 3D Nanoframe as a Highly Active Electrocatalyst for Oxygen Evolution Reaction under Alkaline Condition

Cited by 50 publications

References 51 publications

Rh‐Based Nanocatalysts for Heterogeneous Reactions

Rh‐Based Nanocatalysts for Heterogeneous Reactions

Nanostructured Bifunctional Redox Electrocatalysts

Growth of Highly Active Amorphous RuCu Nanosheets on Cu Nanotubes for the Hydrogen Evolution Reaction in Wide pH Values

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