Efficient Co–N/PC@CNT bifunctional electrocatalytic materials for oxygen reduction and oxygen evolution reactions based on metal–organic frameworks

Ban, Jinjin; Xu, Guancheng; Zhang, Li; Yang, Lijuan; Sun, Zhipeng; Jia, Dianzeng

doi:10.1039/c8nr01457d

Cited by 115 publications

(50 citation statements)

References 48 publications

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“…Moreover, the peak of 286.4 eV is assigned to the C-O band. In addition, the peak of 288.4 eV is associated with C = O [30,50,54,55]. The high-resolution N1 s peak of NPMCNT-300 is shown in Fig.…”

Section: Xps Characterizationmentioning

confidence: 96%

“…Many researchers have made great efforts to design CoP x nanostructures with diverse and high electrocatalytic activity. Since the activity depends largely on their surface properties, many research focused on the structure engineering of electrocatalysts to expose catalytic active sites as much as possible, for example various nanostructured TMPs, including nanoparticles [25,26], nanowires [27,28], nanotubes [29,30], and nanorods [31,32] are developed and most of them showed good electrocatalytic performance. There have been many reports that highefficiency and strong cobalt-based materials were considered as a promising OER electrocatalyst due to its high efficiency, high abundance, and good stability in recent years.…”

Section: Introductionmentioning

confidence: 99%

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Co/CoP Nanoparticles Encapsulated Within N, P-Doped Carbon Nanotubes on Nanoporous Metal-Organic Framework Nanosheets for Oxygen Reduction and Oxygen Evolution Reactions

Yang

Ren

et al. 2020

Nanoscale Res Lett

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Herein, Co/CoP nanoparticles encapsulated with N, P-doped carbon nanotubes derived from the atomic layer deposited hexagonal metal-organic frameworks (MOFs) are obtained by calcinations and subsequent phosphating and are employed as electrocatalyst. The electrocatalytic performance evaluations show that the as-prepared electrocatalyst exhibits an overpotential of 342 mV at current density of 10 mA cm −2 and the Tafel slope of 74 mV dec −1 for oxygen evolution reaction (OER), which is superior to the most advanced ruthenium oxide electrocatalyst. The electrocatalyst also shows better stability than the benchmark RuO 2. After 9 h, the current density is only decreased by 10%, which is far less than the loss of RuO 2. Moreover, its onset potential for oxygen reduction reaction (ORR) is 0.93 V and follows the ideal 4-electron approach. After the stability test, the current density of the electrocatalyst retains 94% of the initial value, which is better than Pt/C. The above results indicate that the electrocatalyst has bifunctional activity and excellent stability both for OER and ORR. It is believed that this strategy provides guidance for the synthesis of cobalt phosphide/carbon-based electrocatalysts.

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Section: Xps Characterizationmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Co/CoP Nanoparticles Encapsulated Within N, P-Doped Carbon Nanotubes on Nanoporous Metal-Organic Framework Nanosheets for Oxygen Reduction and Oxygen Evolution Reactions

Yang

Ren

et al. 2020

Nanoscale Res Lett

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“…Meanwhile, high‐resolution N 1s spectrum of CoP@NPCA‐900 shows pyridinic‐N, pyrrolic‐N, and graphitic‐N structure at 398.5, 400.1, and 401.1 eV (Figure d), respectively . The increased proportions of pyridinic‐N and graphitic‐N among the CoP@NPCA are extremely meaningful because these doped nitrogen structures are beneficial to the improvement of electrical conductivity and catalytic performance of CoP@NPCA‐900 catalysts . High‐resolution P 2p spectrum of CoP@NPCA‐900 is deconvoluted into two peaks including the P–C (132.3 eV) and P–O (133.46 eV) (Figure e), suggesting the formation of P‐doped carbon structure .…”

Section: Resultsmentioning

confidence: 98%

“…Alkaline fuel cells offer possibilities of power supply systems with low cost, high efficiency and excellent stability . As an important evaluation criterion, ORR activities of CoP@NPCA catalysts as the cathode for alkaline fuel cells are evaluated.…”

Section: Resultsmentioning

confidence: 99%

Self‐Templated Conversion of Metallogel into Heterostructured TMP@Carbon Quasiaerogels Boosting Bifunctional Electrocatalysis

Guo

Feng

et al. 2019

Adv Funct Materials

104

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Integration of nanostructured electrocatalysts into a 3D ordered assembly is beneficial for boosting their catalytic performance across various energy conversion applications. In this work, a self-templated carbonization strategy for synthesizing heterostructures of transition metal phosphide@nitrogen/phosphorus dual-doped carbon quasiaerogels (TMP@NPCA) is presented using a rationally designed precursor of a metallogel with Zn/M (M = Co, Fe, and Ni) bimetallic clusters (BMOG) and nitrogen/phosphorus chelate ligands. During the self-templated carbonization, the Zn ions among the BMOG boost a simultaneous catalytic carbonization and activation process of the resultant TMP@NPCA, whereas the M ions offer a versatile self-phosphating preparation of TMP nanoparticles (e.g., CoP, FeP, and Ni 2 P) within the TMP@NPCA. As a proof of concept, the TMP@NPCA catalysts deliver an excellent bifunctional catalytic activity and outstanding stability toward the oxygen reduction reaction and hydrogen evolution reaction, offering competitive advantages to achieve supreme bifunctional catalysis performance over the state-of-the-art TMP catalysts for renewable energy conversion systems.

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“…The catalytic activity of CoP/CNT is at least for 18 h. The presence of the conductive carbon nanotube not only protects CoP but also improves the stability of CoP/CNT . Recently, researchers have turned their attention to carbon‐confined transition metal phosphides (TMPs/C) derived from coordination polymers (CPs) and metal–organic frameworks (MOFs) due to the uniform distribution of TMPs and carbon in TMPs/C. Sun and co‐workers synthesized Co‐P/NC material through carbonization and phosphatization of ZIF‐67.…”

Section: Introductionmentioning

confidence: 99%

CoP/N‐Doped Carbon Nanowire Derived from Co‐Based Coordination Polymer as Efficient Electrocatalyst toward Oxygen Evolution Reaction

Chen

et al. 2020

Energy Tech

Self Cite

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The development of cheap, high‐efficiency, and long‐term durable oxygen evolution reaction (OER) electrocatalysts has become a research hotspot. Carbon‐confined transition‐metal phosphides derived from coordination polymers and metal–organic frameworks have received great attention. Herein, a CoP/N‐doped carbon‐400 (CoP/NC‐400) nanowire is prepared using a coordination polymer [Co(C4H7NO4)]·xH2O (Co‐Asp, Asp = l‐aspartic acid) nanowire as the precursor and template through simultaneous pyrolysis and low‐temperature phosphidation. Electrochemical tests indicate that the CoP/NC‐400 nanowire displays better OER properties than CoP/NC‐300/500 nanowires. The overpotential required to reach a current density of 10 mA cm−2 is 320 mV with a minimum Tafel slope of 89 mV dec−1. Moreover, at a higher current density, the OER performance of the CoP/NC‐400 nanowire is superior to that of RuO2. The excellent electrochemical performance of the CoP/NC‐400 nanowire is attributed to the high electrochemical surface area and the strong synergistic effect of the CoP nanoparticle and the N‐doped carbon nanowire.

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Efficient Co–N/PC@CNT bifunctional electrocatalytic materials for oxygen reduction and oxygen evolution reactions based on metal–organic frameworks

Cited by 115 publications

References 48 publications

Co/CoP Nanoparticles Encapsulated Within N, P-Doped Carbon Nanotubes on Nanoporous Metal-Organic Framework Nanosheets for Oxygen Reduction and Oxygen Evolution Reactions

Co/CoP Nanoparticles Encapsulated Within N, P-Doped Carbon Nanotubes on Nanoporous Metal-Organic Framework Nanosheets for Oxygen Reduction and Oxygen Evolution Reactions

Self‐Templated Conversion of Metallogel into Heterostructured TMP@Carbon Quasiaerogels Boosting Bifunctional Electrocatalysis

CoP/N‐Doped Carbon Nanowire Derived from Co‐Based Coordination Polymer as Efficient Electrocatalyst toward Oxygen Evolution Reaction

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