Non‐Noble Metal‐Based Catalysts Applied to Hydrogen Evolution from Hydrolysis of Boron Hydrides

Wang, Yan; Hu, Zhe; Wu, Shiwei; Li, Guode; Chou, Shulei

doi:10.1002/sstr.202000135

Cited by 23 publications

(12 citation statements)

References 172 publications

(178 reference statements)

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“…Transition metal phosphides such as FeP and CoP are known to be the promising electrocatalysts for the HER due to their high catalytic activity and low cost. [42][43][44][45][46] The 2D FeP NFSLs obtained in this work possess unique structural features that can facilitate mass transport while simultaneously maximizing the exposure of surface active sites, it is therefore of great interest to test their potential as HER electrocatalysts. The electrocatalytic activity of 2D FeP NFSLs was evaluated with a typical three-electrode system in 0.5 m H 2 SO 4 .…”

Section: Resultsmentioning

confidence: 99%

2D FeP Nanoframe Superlattices via Space‐Confined Topochemical Transformation

Deng

Xia

et al. 2022

Advanced Materials

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Self‐assembled nanocrystal superlattices represent an emergent class of designer materials with potentially programmable functionalities. The ability to construct hierarchically structured nanocrystal superlattices with tailored geometry and porosity is critical for extending their applications. Here, 2D superlattices comprising monolayer FeP nanoframes are synthesized through a space‐confined topochemical transformation approach induced by the Kirkendall effect, using carbon‐coated Fe3O4 nanocube superlattices as a precursor. The particle shape and the close‐packed nature of Fe3O4 nanocubes as well as the interconnected carbon layer network contribute to the topochemical transformation process. The resulting 2D FeP nanoframe superlattices possess several unique and advantageous structural features that are unavailable in conventional 3D nanocrystal superlattices, which make them particularly attractive for catalytic applications. As a proof of concept, such 2D FeP nanoframe superlattices are harnessed as highly efficient and durable electrocatalysts for the hydrogen evolution reaction, the performance of which is superior to that of most FeP‐based catalysts reported previously. This topochemical transformation approach is scalable and general, representing a new route of designing hierarchical superlattices with highly open features that cannot be accessible by traditional self‐assembly methods.

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Section: Resultsmentioning

confidence: 99%

2D FeP Nanoframe Superlattices via Space‐Confined Topochemical Transformation

Deng

Xia

et al. 2022

Advanced Materials

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“…44 Furthermore, ZIF-67-derived small Co NPs with increased accessibility promote the catalytic activity. 48 The use of dry ZIF-67 coated on the Ni foam increases the accessibility of Co NPs as active sites. 46 Thus, the manual coating strategy increases the intrinsic catalytic activity of Co−NC/NF 600 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The high dispersion and exposure of Co–CoO x active sites on the Ni foam are responsible for adsorption, activation, and bond breaking of the reactant molecules (NH 3 BH 3 and H 2 O) on the catalyst surface . Furthermore, ZIF-67-derived small Co NPs with increased accessibility promote the catalytic activity . The use of dry ZIF-67 coated on the Ni foam increases the accessibility of Co NPs as active sites .…”

Section: Resultsmentioning

confidence: 99%

Co-Based Nanoparticles Fabricated on Ni Foams for Efficient Hydrogen Generation from Ammonia Borane

Mehdi

Liu

Wei

et al. 2022

ACS Appl. Nano Mater.

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Zeolitic imidazole framework (ZIF-67)-derived Co metal catalysts have gained attention as competitive catalysts due to their high metal loading and superior metal dispersion. However, the problems of Co cluster aggregation during use and difficulty in collection of the powder catalyst from the reaction system need to be solved. In this work, Co-based nanoparticles (NPs) are fabricated on a Ni foam. The monolithic catalyst, Co−NC/NF, has been prepared by the pyrolysis of the ZIF-67/NF precursor using manual coating. The characterization confirms the embedding and uniform distribution of Co NPs (10−20 nm) in the N-doped C matrix. The optimized Co−NC/NF 600 reveals satisfactory catalytic activity upon hydrolysis of ammonia borane with a hydrogen evolution (r B = 1176 mL min −1 g −1 Co ), a turn over frequency (TOF = 180 h −1 ), and an apparent activation energy (E a = 64 kJ mol −1 ). The catalytic activity of Co−NC/NF 600 with Co and CoO x as active sites has the best rank among the previously reported Co monolithic catalysts. The superior stability and reusability of the catalyst with ∼ 90% retention after five uses are demonstrated under mild NH 3 BH 3 hydrolysis conditions, originating from the high antiaggregation ability of the active sites and the easy recollection of the catalyst. The adopted novel strategy has the potential to synthesize monolithic catalysts applicable in other fields of heterogeneous catalysis in industrial applications such as energy storage and conversion.

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“…[6][7][8][9][10] Platinum (Pt)-based materials are remaining utilized as the most desirable HER catalysts but are largely limited by the prohibitive costs and scarce reserves. [11][12][13][14][15][16] Palladium (Pd) with a similar electronic structure to Pt has been a promising Pt-free alternative with a much richer reservation. [17] However, Pd is exceptionally inapplicable for HER compared to Pt (more than 30 times lower than Pt) owing to the strong Pd-H bonding and difficult H desorption, thus leading to an inferior HER performance.…”

Section: Research Articlementioning

confidence: 99%

Ethanol‐Induced Hydrogen Insertion in Ultrafine IrPdH Boosts pH‐Universal Hydrogen Evolution

Wang

Jiang

Lin

et al. 2022

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Engineering Pt‐free catalysts for hydrogen evolution reaction (HER) with high activity and stability is of great significance in electrochemical hydrogen production. Herein, in situ chemical H intercalation into ultrafine Pd to activate this otherwise HER‐inferior material to form the ultrafine IrPdH hydride as an efficient and stable HER electrocatalyst is proposed. The formation of PdIrH depends on a new hydrogenation strategy via using ethanol as the hydrogen resource. It is demonstrated that H atoms in IrPdH originate from the OH and CH2 of ethanol, which fills the gap of ethanol as the hydrogen source for the preparation of Pd hydride. Thanks to the incorporation of H/Ir atoms and ultrafine structure, the IrPdH exhibits superior HER activity and stability in the whole pH range. The IrPdH delivers very low overpotentials of 14, 25 and 60 mV at a current density of 10 mA cm–2 respectively in 0.5 m H2SO4, 1 m KOH, and 1 m PBS electrolytes, which are much better than those of commercial Pt/C and most reported noble metal electrocatalysts. Theoretical calculations confirm that interstitial hydrogen availably refines the electronic density of Pd and Ir sites, which optimizes the adsorption of *H and leads to the significant enhancement of HER performance.

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Non‐Noble Metal‐Based Catalysts Applied to Hydrogen Evolution from Hydrolysis of Boron Hydrides

Abstract: She received her Ph.D. from Nankai University in 2011. Her current research interest is energy-storage materials for hydrogen generation.

Cited by 23 publications

References 172 publications

2D FeP Nanoframe Superlattices via Space‐Confined Topochemical Transformation

2D FeP Nanoframe Superlattices via Space‐Confined Topochemical Transformation

Co-Based Nanoparticles Fabricated on Ni Foams for Efficient Hydrogen Generation from Ammonia Borane

Ethanol‐Induced Hydrogen Insertion in Ultrafine IrPdH Boosts pH‐Universal Hydrogen Evolution

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