Single-atom platinum or ruthenium on C4N as 2D high-performance electrocatalysts for oxygen reduction reaction

Zhou, Yang; Xiang, Meng; Zhu, Yunfeng; Jia, Hui; Jiang, Yong; Dong, Shuang; Yu, Chengbin; Ou, Junfei; Qin, Hengfei

doi:10.1016/j.cej.2021.131347

Cited by 60 publications

(31 citation statements)

References 49 publications

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“…Figure 5B shows the ORR LSV curves of BNC and Co@BNC series, the onset potential ( E 0 ) and half‐wave potential ( E 1/2 ) of samples are read according to the LSV profiles, as shown in Figure 5C. The E 0 and E 1/2 of BNC are only 0.80 and 0.65 V, which are enhanced by introduction of Co with the E 1/2 of 8%Co@BNC is 0.78 V. Among the Co@BNC series, 12%Co@BNC shows the best ORR activity that the E 0 and E 1/2 are 0.89 and 0.78 V, the E 1/2 is just slightly lower than that of Pt/C (0.82 V) 29 …”

Section: Resultsmentioning

confidence: 92%

“…The E 0 and E 1/2 of BNC are only 0.80 and 0.65 V, which are enhanced by introduction of Co with the E 1/2 of 8% Co@BNC is 0.78 V. Among the Co@BNC series, 12% Co@BNC shows the best ORR activity that the E 0 and E 1/2 are 0.89 and 0.78 V, the E 1/2 is just slightly lower than that of Pt/C (0.82 V). 29 The Tafel slope is closely related to the reaction kinetics. 30 As shown in Figure 5D, BNC exhibits the highest Tafel slope of 197 mV dec À1 , while Co@BNC series show much lower slope than BNC.…”

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confidence: 99%

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Cobalt on boron‐doped carbon nitride for a novel bifunctional electrocatalyst in zinc‐air batteries

et al. 2021

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Carbon-based materials have been widely applied in electrochemical field because of good conductivity and low cost. However, the electrochemical performances have been hindered by few active sites in themselves, heteroatom doping is a general method to solve the problem. Herein, boron (B) is doped into the carbon nitride (CN) derived from glucose and melamine by a facile way, and cobalt (Co) is introduced in the B-doped carbon nitride (BNC) to form Co@BNC nanocomposites. Among the different contents of Co in Co@BNC series, 12%Co@BNC shows the best oxygen reduction reaction properties with half-wave potential of 0.78 V, good stability and methanol tolerance in alkaline solution. Besides, 12%Co@BNC also shows oxygen evolution reaction voltage of 1.67 V, and good bifunctional electrocatalysis behaviors with ΔE of 0.89 V. This bifunctional electrocatalyst can be applied in zinc-air batteries for transportation field.

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Section: Resultsmentioning

confidence: 92%

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confidence: 99%

Cobalt on boron‐doped carbon nitride for a novel bifunctional electrocatalyst in zinc‐air batteries

et al. 2021

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“…In this case, it is very important to reduce the ineffective mining and utilization. In recent researches, non-noble metalbased high-performance electrocatalysts for HER, [311][312][313][314] OER, [315][316][317][318][319][320] and ORR [321][322][323][324][325] have aroused much attention, and these reports successfully reduced the cost of raw materials by nano-engineering. The development of Ir-based electrocatalysts can also refer to those synthetic procedures, or alloy with these non-noble metals to alleviate the Ir-content.…”

Section: Discussionmentioning

confidence: 99%

Iridium‐based electrocatalysts toward sustainable energy conversion

Huang

Zhao

2022

EcoMat

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Electrocatalysis is an important branch in electrochemistry and also has a significant position in energy storage/conversion. Iridium (Ir)-based electrocatalysts show promise because of the inherent redox property. Considering the abundance and expensive cost of such noble metal, significant efforts have been made to rationally improve the electrochemical performance of Ir-based electrocatalysts during these years from the viewpoints of structural design and kinetic analysis. Most of the reports may aim to achieve high Ir atomic utilization with more exposed active sites, and both high electrochemical activity and durable stability are expected. In this case, Ir-based single atoms, nanostructures, and composites are reported with various electrocatalytic applications of water splitting (involving hydrogen evolution and oxygen evolution reaction) and other electrocatalytic oxidation reactions (involving hydrogen oxidation reaction, methanol oxidation reaction, ammonia oxidation reaction, and formic acid oxidation reaction) as well as other electrocatalytic reduction reactions (involving oxygen reduction reaction, carbon dioxide reduction reaction, and nitrogen reduction reaction). These works deserve to be discussed and this review article comprehensively summarized the most significant reports. We analyzed Ir-based electrocatalysts from the viewpoints of synthesis, structure, electrochemical property, and reaction mechanism. The challenges and outlooks in the future were also provided from the aspects of fundamental studies and industrial applications, which may attract more attention and provide new insight into the design of advanced Ir-based electrocatalysts with high performance.

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“…Solar-to-electrical energy harvesting is a general utilization for practical applications. External solar energy is absorbed to store as thermal energy, which can be transferred into several forms of renewable energy to reduce environmental pollution [1,2]. The thermoelectric power generator (TEG) is composed of working materials to induce electron movement [3,4].…”

Section: Introductionmentioning

confidence: 99%

Phase Change Material (PCM) Composite Supported by 3D Cross-Linked Porous Graphene Aerogel

Song

2022

Materials

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Integration of form-stable phase change material (PCM) composites with a pyro system can provide sufficient electrical energy during the light-on/off process. In this work, modified 3D porous graphene aerogel is utilized as a reliable supporting material to effectively reduce volume shrinkage during the infiltration process. Poly(vinylidene difluoride) (PVDF) is used for a transparent pyro film in the pyro system. The temperature fluctuation gives rise to a noise effect that restricts the generation of energy harvesting. The cross-linked graphene aerogel consisting of PCM composites can stabilize the temperature fluctuation in both melting and cooling processes. This shows that PCM composites can be applied to the pyro system under the change of the external environment. To evaluate the experimental results, a numerical simulation was conducted by using the finite element method (FEM).

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Single-atom platinum or ruthenium on C4N as 2D high-performance electrocatalysts for oxygen reduction reaction

Cited by 60 publications

References 49 publications

Cobalt on boron‐doped carbon nitride for a novel bifunctional electrocatalyst in zinc‐air batteries

Cobalt on boron‐doped carbon nitride for a novel bifunctional electrocatalyst in zinc‐air batteries

Iridium‐based electrocatalysts toward sustainable energy conversion

Phase Change Material (PCM) Composite Supported by 3D Cross-Linked Porous Graphene Aerogel

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