Surface reconstruction engineering of cobalt phosphides by Ru inducement to form hollow Ru-RuPx-CoxP pre-electrocatalysts with accelerated oxygen evolution reaction

Wang, Lei; Zhou, Quan; Pu, Zonghua; Zhang, Qi; Mu, Xueqin; Jing, Haiyan; Liu, Suli; Chen, Changyun; Mu, Shichun

doi:10.1016/j.nanoen.2018.08.061

Cited by 141 publications

(67 citation statements)

References 43 publications

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“…The first example reported by Chen and co‐workers on very active Cu‐doped Ru−RuO 2 NPs (Table , entry 5), according to DFT calculations, revealed that Cu doping allowed tailoring of the d‐band center of the RuO 2 active sites . A second report on the same subject highlighted a catalyst composed of Ru/RuO 2 sites at the surface of Co x P hollow polyhedra (Ru−RuP x −Co x P; Table , entry 6) . The high electrocatalytic OER performance observed is attributed to both the synergism of the two metals present and the high specific surface area of the hybrid nanomaterial.…”

Section: Oxygen Evolution Reaction (Oer)mentioning

confidence: 98%

“…[47] As econd report on the same subject highlighted ac atalyst composed of Ru/RuO 2 sites at the surfaceo fC o x P hollow polyhedra (RuÀRuP x ÀCo x P; Table 2, entry 6). [48] The high electrocatalytic OER performance observed is attributed to both the synergism of the two metalsp resent and the high specific surface area of the hybrid nanomaterial.…”

Section: Nonsupported Systems Prepared Ex Situmentioning

confidence: 99%

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Ruthenium Nanoparticles for Catalytic Water Splitting

et al. 2019

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Both global warming and limited fossil resources make the transition from fossil to solar fuels an urgent matter. In this regard, the splitting of water activated by sunlight is a sustainable and carbon‐free new energy conversion scheme able to produce efficient technological devices. The availability of appropriate catalysts is essential for the proper kinetics of the two key processes involved, namely, the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). During the last decade, ruthenium nanoparticle derivatives have emerged as true potential substitutes for the state‐of‐the‐art platinum and iridium oxide species for the HER and OER, respectively. Thus, after a summary of the most common methods for catalyst benchmarking, this review covers the most significant developments of ruthenium‐based nanoparticles used as catalysts for the water‐splitting process. Furthermore, the key factors that govern the catalytic performance of these nanocatalysts are discussed in view of future research directions.

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Section: Oxygen Evolution Reaction (Oer)mentioning

confidence: 98%

Section: Nonsupported Systems Prepared Ex Situmentioning

confidence: 99%

Ruthenium Nanoparticles for Catalytic Water Splitting

et al. 2019

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“…In particular, the oxygen evolution reaction (OER) is a challenging reaction with high activation overpotential and high potential conditions, leading to strongly oxidizing operating conditions for the anode materials. Many different materials have been investigated for this reaction (Wang et al, 2018;Laha et al, 2019;Retuerto et al, 2019;Chen et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis and Modification of RuO2 Materials for the Oxygen Evolution Reaction

2020

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Ion exchange method as a green synthesis route is proposed to prepare hydrous ruthenium oxide nanoparticles (H-RuO 2). Calcination of H-RuO 2 at 350°C resulted in the crystalline rutile RuO 2 nanoparticles (C-RuO 2). Treatment of H-RuO 2 with 20 vol% ammonium hydroxide solution under microwave irradiation and calcination at 350°C resulted in a highly electrocatalytic active crystalline RuO 2 nanoparticles (A-C-RuO 2). Electrocatalytic performances of H-RuO 2 , C-RuO 2 and A-C-RuO 2 for the oxygen evolution reaction in 0.50 mol L −1 H 2 SO 4 medium are evaluated and compared. Improved performances towards the oxygen evolution reaction are observed for A-C-RuO 2 when compared to C-RuO 2. Based on XRD, TEM, XPS and Raman characterizations performed on all the specimens, it is deduced that the physicochemical properties (crystallinity, mean crystallite size, level of hydrous rutile content) are varied for A-C-RuO 2 when compared to C-RuO 2. Structure-property correlation has been established to describe the higher electrocatalytic activity of A-C-RuO 2 .

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“…The comparative high-resolution Co 2p and P 2p spectra (Fig. 3b, c) show that the surface oxidation is inevitable, when they are exposed to air, leading to the presence of the Co-O and P-O bonds in CoP and Co 1−x V x P. For the NF@CoP electrode, the Co 2p 3/2 (∼778.3 eV) and 2p 1/2 peaks (793.4 eV) indicate the existence of metallic Co in CoP [42,43], while the [37,42]. The strong shakeup satellites (identified as "Sat.")…”

Section: Resultsmentioning

confidence: 96%

Synergistic electronic and morphological modulation on ternary Co1−xVxP nanoneedle arrays for hydrogen evolution reaction with large current density

Yang

Shang

Li³

et al. 2020

Sci. China Mater.

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It is a great challenge to prepare non-noble metal electrocatalysts toward hydrogen evolution reaction (HER) with large current density. Synergistic electronic and morphological structures of the catalyst have been considered as an effective method to improve the catalytic performance, due to the enhanced intrinsic activity and enlarged accessible active sites. Herein, we present novel ternary Co 1−x V x P nanoneedle arrays with modulated electronic and morphological structures as an electrocatalyst for highly efficient HER in alkaline solution. The NF@Co 1−x V x P catalyst shows a remarkable catalytic ability with low overpotentials of 46 and 226 mV at current densities of 10 and 400 mA cm −2 , respectively, as well as a small Tafel slope and superior stability. Combining the experimental and computational study, the excellent catalytic performance was attributed to the improved physical and chemical properties (conductivity and surface activity), large active surface area, and fast reaction kinetics. Furthermore, the assembled Co-V based electrolyzer (NF@Co 1−x V x-HNNs(+)||NF@Co 1−x V x P(−)) delivers small full-cell voltages of 1.58, 1.75, and 1.92 V at 10, 100, and 300 mA cm −2 , respectively. Our findings provide a systematic understanding on the V-incorporation strategy to promote highly efficient ternary electrocatalysts via synergistic control of morphology and electronic structures.

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Surface reconstruction engineering of cobalt phosphides by Ru inducement to form hollow Ru-RuPx-CoxP pre-electrocatalysts with accelerated oxygen evolution reaction

Cited by 141 publications

References 43 publications

Ruthenium Nanoparticles for Catalytic Water Splitting

Ruthenium Nanoparticles for Catalytic Water Splitting

Green Synthesis and Modification of RuO2 Materials for the Oxygen Evolution Reaction

Synergistic electronic and morphological modulation on ternary Co1−xVxP nanoneedle arrays for hydrogen evolution reaction with large current density

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