Self-crosslinking carbon dots loaded ruthenium dots as an efficient and super-stable hydrogen production electrocatalyst at all pH values

Liu, Yuan; Yang, Yongpeng; Peng, Zhikun; Liu, Zhongyi; Chen, Zhimin; Shang, Lu; Lu, Siyu; Zhang, Tierui

doi:10.1016/j.nanoen.2019.104023

Cited by 128 publications

(87 citation statements)

References 51 publications

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“…Particularly, to match the anodic oxygen evolution reaction where usually oxides are applied as catalysts (they remain stable only at pH ≥ 7), it is essential to develop pH‐universal HER electrocatalysts. [ 21,22 ] However, this is not an easy task because the hydrogen evolution is dramatically retarded at basic or neutral conditions due to the sluggish water dissociation step incurred by an insufficient number of protons. While the HER studies are expanded to various pH ranges recently, the creation of superior electrocatalysts outperforming commercial Pt/C in every pH environment is still a grand challenge.…”

Section: Resultsmentioning

confidence: 99%

“…For example, ruthenium‐dots‐loaded self‐crosslinking carbon dots (Ru@SC‐CDs) performed slightly better than commercial Pt/C from the aspects of overpotential and exchange current density, while it is inferior to Pt/C in acid and neutral environment. [ 22 ] Despite a similar overpotential to that of Pt/C in 1 m PBS solution (≈57 mV), the reported N, P dual‐doped carbon‐encapsulated ruthenium diphosphide (RuP 2 @NPC) NPs cannot compete with Pt/C in view of either Tafel slope and overpotential in acid or alkaline environment. [ 21 ] Therefore, the as‐obtained Au–Rh aerogel displays unparalleled advantages as a superior pH‐universal electrocatalyst for the HER.…”

Section: Resultsmentioning

confidence: 99%

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Engineering Multimetallic Aerogels for pH‐Universal HER and ORR Electrocatalysis

Jin

Hübner

et al. 2020

Advanced Energy Materials

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The advent of noble metal aerogels (NMAs), that feature the high catalytic activity of noble metals and unique structural attributes of aerogels, has stimulated research on a new class of outstanding electrocatalysts. However, limited by the available compositions, the explored electrocatalytic reactions on NMAs are highly restricted and certain important electrochemical processes have not been investigated. Here, an effective gelation approach is demonstrated by using a strong salting‐out agent (i.e., NH4F), thereby expanding the composition of NMAs to various multimetallic systems and providing a platform to investigate composition‐dependent electrocatalytic performance of NMAs. Combining structural features of aerogels and optimized chemical compositions, the Au–Pt and Au–Rh aerogel catalysts manifest remarkable pH‐universal (pH = 0–14) performance surpassing commercial Pt/C and many other nanoparticle (NP)‐based catalysts in the electrocatalytic oxygen reduction reaction, hydrogen evolution reaction, and water splitting, displaying enormous potential for the electrochemical hydrogen production, fuel cells, etc.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Engineering Multimetallic Aerogels for pH‐Universal HER and ORR Electrocatalysis

Jin

Hübner

et al. 2020

Advanced Energy Materials

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“…To meet the rising demands of energy storage and sustainability, there are impending needs to discover new high-performance eco-friendly materials. [1][2][3][4][5][6] Electrochemical energy storage systems, like batteries and supercapacitors, are considered to be excellent options. [7][8][9][10][11][12][13] Supercapacitors exhibit high performance using bioderived materials and nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Bimetallic tungstate nanoparticle-decorated-lignin electrodes for flexible supercapacitors

et al. 2020

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“…[1,2] Hydrogen (H 2 ) is regarded as one of the most potential clean energy sources due to its high energy density, no carbon emission, and unpolluted feature. [3][4][5][6][7][8][9] Until now, electrochemical water splitting is deemed as an essential and effective method to prepare H 2 because of its high purity of product and little energy waste. [10][11][12][13] However, hydrogen evolution reaction (HER) in nonacidic conditions should be paid much attention because it is a direct hydrogen production half-reaction which reaction rate is much more sluggish than that in acid.…”

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

Small

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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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Self-crosslinking carbon dots loaded ruthenium dots as an efficient and super-stable hydrogen production electrocatalyst at all pH values

Cited by 128 publications

References 51 publications

Engineering Multimetallic Aerogels for pH‐Universal HER and ORR Electrocatalysis

Engineering Multimetallic Aerogels for pH‐Universal HER and ORR Electrocatalysis

Bimetallic tungstate nanoparticle-decorated-lignin electrodes for flexible supercapacitors

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

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