A General Strategy for the Synthesis of PtM (M=Fe, Co, Ni) Decorated Three‐Dimensional Hollow Graphene Nanospheres for Efficient Methanol Electrooxidation

Qiu, Xiaoyu; Li, Tiancheng; Deng, Sihui; Cen, Ke Fa; Xu, Lin; Tang, Yawen

doi:10.1002/chem.201704959

Cited by 60 publications

(26 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Among various substrates, 2D graphene-based nanosheets are regarded as a class of promising candidate because of their large surface area, outstanding mechanical robustness and superior electrical conductivity. [29][30][31] Therefore, 3D graphene hollow nanospheres are deservedly expected as an ideal platform to immobilize isolated Fe single atoms. [26][27][28] To this end, we have recently developed a sophisticated and universal template-engaged strategy to fabricate 3D graphene hollow nanospheres, which could exhibit improved mechanical strength, accelerated reaction kinetics, and enhanced electrocatalytic performance when served as a catalyst support.…”

Section: Introductionmentioning

confidence: 99%

Isolated Fe Single Atomic Sites Anchored on Highly Steady Hollow Graphene Nanospheres as an Efficient Electrocatalyst for the Oxygen Reduction Reaction

et al. 2018

Self Cite

View full text Add to dashboard Cite

The rational design of economical and high‐performance nanocatalysts to substitute Pt for the oxygen reduction reaction (ORR) is extremely desirable for the advancement of sustainable energy‐conversion devices. Isolated single atom (ISA) catalysts have sparked tremendous interests in electrocatalysis due to their maximized atom utilization efficiency. Nevertheless, the fabrication of ISA catalysts remains a grand challenge. Here, a template‐assisted approach is demonstrated to synthesize isolated Fe single atomic sites anchoring on graphene hollow nanospheres (denoted as Fe ISAs/GHSs) by using Fe phthalocyanine (FePc) as Fe precursor. The rigid planar macrocycle structure of FePc molecules and the steric‐hindrance effect of graphene nanospheres are responsible for the dispersion of Fe–Nx species at an atomic level. The combination of atomically dispersed Fe active sites and highly steady hollow substrate affords the Fe ISAs/GHSs outstanding ORR performance with enhanced activity, long‐term stability, and better tolerance to methanol, SO2, and NOx in alkaline medium, outperforming the state‐of‐the‐art commercial Pt/C catalyst. This work highlights the great promises of cost‐effective Fe‐based ISA catalysts in electrocatalysis and provides a versatile strategy for the synthesis of other single metal atom catalysts with superior performance for diverse applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Isolated Fe Single Atomic Sites Anchored on Highly Steady Hollow Graphene Nanospheres as an Efficient Electrocatalyst for the Oxygen Reduction Reaction

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, the obtained spherical aberration corrected HAADF‐STEM image for the different orientation of the nanowire (Figure e) revealed an interplanar spacing of 0.195 nm, corresponding to the {200} plane, and 0.138 nm, corresponding to the {220} plane. As for the obtained X‐ray diffraction (XRD) patterns of the Pd@PtNi NWs (Figure f), these demonstrated a typical face‐centered cubic pattern that was not consistent with pure Pt or pure Ni, in which compared with those of pure Pt (JCPDS #04‐0802), the corresponding diffraction peaks of the Pd@PtNi NWs shifted to higher 2θ due to decreased lattice spacing through alloying with Ni, indicating the existence of a single PtNi alloy phase …”

Section: Resultsmentioning

confidence: 96%

High‐Indexed PtNi Alloy Skin Spiraled on Pd Nanowires for Highly Efficient Oxygen Reduction Reaction Catalysis

Zhao

Lü

Dang

et al. 2019

Small

View full text Add to dashboard Cite

The catalytic performance of Pt‐based catalysts for oxygen reduction reactions (ORR) can generally be enhanced by constructing high‐index exposed facets (HIFs). However, the synthesis of Pt alloyed high‐index skins on 1D non‐Pt surfaces to further improve Pt utilization and stability remains a fundamental challenge for practical nanocrystals. In this work, Pd nanowires (NWs) are selected as a rational medium to facilitate the epitaxial growth of Pt and Ni. Based on the different nucleation and growth habits of Pt and Ni, a continuous PtNi alloy skin bounded with HIFs spiraled on a Pd core can be obtained. Here, the as‐prepared helical Pd@PtNi NWs possess high HIF densities, low Pt contents, and optimized oxygen adsorption energies, demonstrating an enhanced ORR mass activity of 1.75 A mgPt−1 and a specific activity of 3.18 mA cm−2, which are 10 times and 12 times higher than commercial Pt/C catalysts, respectively. In addition, the 1D nanostructure enables the catalyst to be highly stable after 30 000 potential sweeping cycles. This work successfully extends bulky high‐indexed Pt alloys to core–shell nanostructures with the design of a new, highly efficient and stable Pt‐based catalyst for fuel cells.

show abstract

“…Abundant mass transfer channels were recently introduced by a geometric change of rGO surface, as reported by Qiu et al [46]. Following the development of a sacrificial template method, platinum nanoparticles on 3D reduced graphene oxide hollow nanospheres were synthesized.…”

Section: Current Trends In 3d Structure Assembly For Enhanced Mass Trmentioning

confidence: 99%

Defect Engineering in Reduced Graphene Oxide toward Advanced Energy Conversion

Cordeiro¹

2018

Graphene Oxide - Applications and Opportunities

View full text Add to dashboard Cite

Defect engineering in reduced graphene oxide (rGO) for a smart design of fuel-cell supports has become an effective approach to improve the restricted two-dimensional (2D) mass and charge transfer and to boost the alcohol oxidation reaction. The present minireview describes recent trends across prominent characteristics of tailored reduced graphene oxides, which include but are not restricted to, engineered three-dimensional (3D) nanostructures for better mass transport, tuned electron/hole conduction for easier electrical transport, and hybridized surfaces for high electrocatalytic activity. Special focus fixes upon the experimental progress on defect engineering, from three-dimensional structure assembly to surface metal complexation and heteroatom doping to size-controlled defect formation. Given their crucial impact on reduced graphene oxide properties, controlled methods for synthesis, and processing offer considerable promise toward next-generation carbon nanomaterials for electrocatalysis.

show abstract

A General Strategy for the Synthesis of PtM (M=Fe, Co, Ni) Decorated Three‐Dimensional Hollow Graphene Nanospheres for Efficient Methanol Electrooxidation

Cited by 60 publications

References 38 publications

Isolated Fe Single Atomic Sites Anchored on Highly Steady Hollow Graphene Nanospheres as an Efficient Electrocatalyst for the Oxygen Reduction Reaction

Isolated Fe Single Atomic Sites Anchored on Highly Steady Hollow Graphene Nanospheres as an Efficient Electrocatalyst for the Oxygen Reduction Reaction

High‐Indexed PtNi Alloy Skin Spiraled on Pd Nanowires for Highly Efficient Oxygen Reduction Reaction Catalysis

Defect Engineering in Reduced Graphene Oxide toward Advanced Energy Conversion

Contact Info

Product

Resources

About