Interfacial proton enrichment enhances proton-coupled electrocatalytic reactions

Zhao, Yue; Ding, Yu; Qiao, Bin; Zheng, Kai; Liu, Pei; Li, Shu-Ni; Chen, Yu

doi:10.1039/c8ta06856a

Cited by 33 publications

(25 citation statements)

References 70 publications

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“…Even more importantly, selectivity was enhanced with a number of transferred electrons close to 4, suggesting almost full reduction of oxygen to OH − . PdNi nanostructures stabilized with polyethyleneimine (PEI) have been reported to exhibit more positive E 1/2 and E onset potentials than unfunctionalized PdNi for ORR in acidic media with excellent selectivity . In this case, the number of transferred electrons was 3.9, suggesting an efficient conversion of O 2 to H 2 O.…”

Section: Chemical Functionalization Of Alloysmentioning

confidence: 95%

Surface Modification for Promoting Durable, Efficient, and Selective Electrocatalysts

2020

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Intensive research into the design of catalysts involved in energy conversion and fuel cell technologies has allowed great progress in the field. However, durable, efficient and selective electrocatalytic systems for the activation of fuel molecules at the lowest cost are still needed. The most developed strategies consist of tailoring the shape, size and composition of metallic nanomaterials. Yet, deliberate surface modification of the catalysts should be considered as a promising alternative approach. The functionalization of metallic catalysts with organic ligands has been recently demonstrated to promote high catalytic activity. This Review focuses on the functionalization of metallic or alloy catalysts with organic ligands, showing the impact of the surface modification for different materials and different reactions. Hybrid systems based on this alternative strategy could contribute to the elaboration of cutting‐edge systems for electrocatalysis.

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Section: Chemical Functionalization Of Alloysmentioning

confidence: 95%

Surface Modification for Promoting Durable, Efficient, and Selective Electrocatalysts

2020

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“…Additionally, PdNi alloy nanostructures (PdNi‐ANSs)‐polyethyleneimine (PEI) inorganic–organic nanocomposites (PdNi‐ANSs@PEI) are an alternative candidate for Pt noble metal due to lower cost and higher efficient HER activity relatively. [ 38 ] The PdNi‐ANSs@PEI were synthesized through a novel method by using PEI‐assisted cyanogel‐reduction strategy. The transmission electron microscope (TEM) images in Figure 3D show that PdNi‐ANSs@PEI600 with 3D network architecture consists of lots of small nanoparticles with a 6 nm average diameter.…”

Section: Performance Of Water Splittingmentioning

confidence: 99%

“…Additionally, PdNi alloy nanostructures (PdNi-ANSs)-polyethyleneimine (PEI) inorganic-organic nanocomposites (PdNi-ANSs@PEI) are an alternative candidate for Pt noble metal due to lower cost and higher efficient HER activity relatively. [38] The PdNi-ANSs@PEI were synthesized through a novel method by using PEI-assisted cyanogel-reduction strategy.…”

Section: Performance Of Water Splittingmentioning

confidence: 99%

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Interface engineering of metal nanomaterials enhance the electrocatalytic water splitting and fuel cell performance

Jiang

Zhang

et al. 2021

Electrochemical Science Adv

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We conclude this review with a perspective of interface engineering strategy for enhancing the activity of metal catalysts for electrocatalytic water splitting and direct alcohol fuel cells (DAFCs). The organic ligands could modify the surface of metal nanostructures, and also could affect the electronic structure of metals. Due to the specific physical and chemical properties of organic ligands, the metal nanostructures exhibit super catalytic selectivity to some reaction precursors. This minireview focuses on evaluating the catalytic mechanisms for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), alcohol oxygen reaction (AOR), and oxygen reduction reaction (ORR), which are the main reactions for water splitting and DAFCs, respectively, which are driven by interface engineering. This new strategy provides an approach for the design and synthesis of nanostructures modifying by organic ligands, providing a reasonable outlook of their extensive application in chemical energy conversion and storage, and selective fuel production.

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“…Nanostructured gels possess a tunable structure and composition, a highly porous structure, an effective pathway for charge/mass transport, and ease of synthesis and functionalization and thus have emerged as ideal material platforms for electrochemical energy storage and conversion. − Recently, various gels and their derivatives, including graphene gels, conductive polymer gels, − ionically conductive gels, , and so on, have been extensively developed and utilized as advanced electrodes, binders, electrolytes, and electrocatalytic materials for energy-related applications. As a special class of inorganic gels, cyanogels refer to cyano-bridged coordination polymer gels, which were pioneered by Bocarsly et al in 1993. − Cyanogels are generally formed through ligand-substitution reactions between main-group or noble-metal chloride/chlorometalate (M′ = Sn, In, Sb, Pd, Pt, Rh, etc.) and transition-metal cyanometalate (M′′ = Fe, Co, Ni, etc.)…”

mentioning

confidence: 99%

Inorganic Cyanogels and Their Derivatives for Electrochemical Energy Storage and Conversion

Fang

Zhang

et al. 2019

ACS Materials Lett.

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Nanostructured gels have emerged as a unique material platform for various applications such as energy storage and catalysis thanks to the tunable composition and structure, porous framework for mass transfer, and ease of synthesis and functionalization. Recently, cyanogels and their derivatives have aroused considerable research interests owing to their high composition tunability, large surface area, and hierarchical porosity for charge and mass transport, which contribute to the high performance when applied to energy storage and conversion devices. This Perspective highlights the key features of cyanogels and their derivatives toward electrochemicalenergy-related applications, summarizes the synthesis and functionalization of cyanogels, discusses recent advances in material design and synthetic routes of various cyanogel-derived functional nanomaterials in energy-related applications, and proposes future directions for their scientific and technological development.

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Interfacial proton enrichment enhances proton-coupled electrocatalytic reactions

Abstract: PdNi alloy nanostructures–polyethyleneimine inorganic–organic nanocomposites exhibit enhanced catalytic activity for the oxygen reduction reaction and hydrogen evolution reaction in acidic media due to interfacial proton enrichment.

Cited by 33 publications

References 70 publications

Surface Modification for Promoting Durable, Efficient, and Selective Electrocatalysts

Surface Modification for Promoting Durable, Efficient, and Selective Electrocatalysts

Interface engineering of metal nanomaterials enhance the electrocatalytic water splitting and fuel cell performance

Inorganic Cyanogels and Their Derivatives for Electrochemical Energy Storage and Conversion

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