Ordered Ag@Pd alloy supported on Ti4O7 by ascorbic acid-assisted galvanic replacement for efficient oxygen reduction

Zhang, Li; Luo, Yangjun; Huang, Heming; Zhang, Huijuan; Wang, Youyuan; Wang, Yu

doi:10.1016/j.jallcom.2022.167251

Cited by 12 publications

(4 citation statements)

References 45 publications

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“…There are two valence states in L-1 %SnÀ Ti 4 O 7 : Ti 3 + (462.42 eV and 457.32 eV) and Ti 4 + (464.52 eV and 458.82 eV). [27] Compared to the former, the Ti binding energy of D-1 %SnÀ Ti 4 O 7 moves to a lower value (Figure S11). This may be attributed to the local electronic partial reduction of Ti 4 + , forming more O V and Ti 3 + .…”

Section: Resultsmentioning

confidence: 94%

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sun,

Luo,

Dai

et al. 2024

Chemistry A European J

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Developing stable and highly selective two‐electron oxygen reduction reaction (2e− ORR) electrocatalysts for producing hydrogen peroxide (H2O2) is considered a major challenge to replace the anthraquinone process and achieve a sustainable green economy. Here, we doped Sn into Ti4O7 (D−Sn−Ti4O7) by simple polymerization post‐calcination method as a high‐efficiency 2e− ORR electrocatalyst. In addition, we also applied plain calcination after the grinding method to load Sn on Ti4O7 (L−Sn−Ti4O7) as a comparison. However, the performance of L−Sn−Ti4O7 is far inferior to that of the D−Sn−Ti4O7. D−Sn−Ti4O7 exhibits a starting potential of 0.769 V (versus the reversible hydrogen electrode, RHE) and a high H2O2 selectivity of 95.7 %. Excitingly, the catalyst can maintain a stable current density of 2.43 mA ⋅ cm−2 for 3600 s in our self‐made H‐type cell, and the cumulative H2O2 production reaches 359.2 mg ⋅ L−1 within 50,000 s at 0.3 V. The performance of D−Sn−Ti4O7 is better than that of the non‐noble metal 2e− ORR catalysts reported so far. The doping of Sn not only improves the conductivity but also leads to the lattice distortion of Ti4O7, further forming more oxygen vacancies and Ti3+, which greatly improves its 2e− ORR performance compared with the original Ti4O7. In contrast, since the Sn on the surface of L−Sn−Ti4O7 displays a synergistic effect with Tin+ (3≤n≤4) of Ti4O7, the active center Tin+ dissociates the O=O bond, making it more inclined to 4e− ORR.

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Section: Resultsmentioning

confidence: 94%

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sun,

Luo,

Dai

et al. 2024

Chemistry A European J

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“…[48] Furthermore, Ag@Pd supported on Ti 4 O 7 was synthesized via ascorbic acid-assisted galvanic replacement. [49] Similarly, galvanic replacement on a nickel net is considered a preferred method for micro-adjustment on industrial products to enhance performance, such as Ni-foam@Pd, [50] PdÀ Pt-Ag ternary alloy, [45e] and nanowire arrays Ni@PdÀ Ni core-shell structure. [51] Additionally, due to the high thermal stability of the noble metal layers, galvanic replacement reactions can be combined with post-treatments to oxidize the core, resulting in the Cu 2 O@Pt electrocatalyst.…”

Section: Synthesized Through Electro-reductionmentioning

confidence: 99%

Advances in Strain‐Induced Noble Metal Nanohybrids for Electro‐Catalysis: From Theoretical Mechanisms to Practical Use

Chen,

Li,

Zhao

et al. 2024

ChemElectroChem

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In response to the climate goal of achieving carbon neutrality by 2050, efficient electrochemical energy conversion devices are garnering increasing attention. However, the enhancement of electrochemical performance using noble metal electrocatalysts, along with cost reduction and electrode fabrication, remain significant challenges. Noble metal hybrid nanostructures, possessing multiple surface functionalities, lead to outstanding electrocatalytic performances and low‐cost potential. Strain effects can bolster the bonding strength between the noble metal layers and the substrate or core layers, while simultaneously affecting electrocatalytic performance through tuning the binding strength between catalytically active sites and reactants, including intermediates. This review encapsulates the research efforts directed towards improving the performance of noble metal electrocatalysts and provides an overview of the latest advancements in controlling the surface state of noble metals by incorporating a secondary component. We discuss systematic approaches to adjusting surface strain effects on noble metals, characterization techniques, and application case studies, while extracting key design indicators for readers to consider from a macroscopic perspective. Further, we outline the challenges encountered and current solutions when advancing noble metal catalysts from theoretical mechanisms to practical use. Finally, the perspectives on the future research of noble metal surface layer control techniques were also provided.

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“…By employing the GR method, various morphologies of bimetallic compounds can be constructed, such as core–shell [ 102 ], snow-like [ 103 ], etc. [ 104 , 105 ], as shown in Figure 8 .…”

Section: Synthesis Of Supported Pd-based Bimetallic Nano-catalystsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Synthetic Strategies of Supported Pd-Based Bimetallic Catalysts for Selective Semi-Hydrogenation of Acetylene: A Review and Perspectives

Cao

Jang

et al. 2023

Molecules

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Selective semi-hydrogenation of acetylene is an extremely important reaction from both industrial and theoretical perspectives. Palladium, due to its unique chemical and physical properties, is the most active and currently irreplaceable metal for this reaction in industry, but the poor catalytic selectivity towards ethylene is also its inherent shortcoming. Introducing a secondary metal to tune a geometric and electronic structures of Pd nanoparticles and to create a synergistic effect is the most widely used strategy to effectively improve the overall catalytic performance of Pd-based catalysts. Thus, various supported Pd-based bimetallic catalysts for selective semi-hydrogenation of acetylene have been exploited in the past decade. Timely comparison, analysis, and summarizing of various preparation methods may offer a beneficial reference for the subsequent development of such catalysts. In this context, herein, the advances in synthesis strategies of catalysts, including nano-catalysts, single atom alloys (SAAs), as well as bimetallic dual atom catalysts are summarized systematically. Their advantages and disadvantages are comparatively discussed. Finally, future perspectives for the synthetic strategies of supported Pd-based bimetallic catalysts for selective semi-hydrogenation of acetylene are proposed.

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Ordered Ag@Pd alloy supported on Ti4O7 by ascorbic acid-assisted galvanic replacement for efficient oxygen reduction

Cited by 12 publications

References 45 publications

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Advances in Strain‐Induced Noble Metal Nanohybrids for Electro‐Catalysis: From Theoretical Mechanisms to Practical Use

Synthetic Strategies of Supported Pd-Based Bimetallic Catalysts for Selective Semi-Hydrogenation of Acetylene: A Review and Perspectives

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Ordered Ag@Pd alloy supported on Ti4O7 by ascorbic acid-assisted galvanic replacement for efficient oxygen reduction

Cited by 12 publications

References 45 publications

Sn Bulk Phase Doping and Surface Modification on Ti4O7 for Oxygen Reduction to Hydrogen Peroxide

Sn Bulk Phase Doping and Surface Modification on Ti4O7 for Oxygen Reduction to Hydrogen Peroxide

Advances in Strain‐Induced Noble Metal Nanohybrids for Electro‐Catalysis: From Theoretical Mechanisms to Practical Use

Synthetic Strategies of Supported Pd-Based Bimetallic Catalysts for Selective Semi-Hydrogenation of Acetylene: A Review and Perspectives

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Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide