Recent Progress of Carbon-Supported Single-Atom Catalysts for Energy Conversion and Storage

Yang, Yongchao; Yang, Yuxin; Pei, Zengxia; Wu, Kuang‐Hsu; Tan, Chunhui; Wang, Haozhu; Li, Wei; Mahmood, Asif; Li, Huaming; Dong, Juncai; Zhao, Shenlong; Chen, Yuan

doi:10.1016/j.matt.2020.07.032

Cited by 221 publications

(133 citation statements)

References 162 publications

(191 reference statements)

Supporting

Mentioning

125

Contrasting

Order By: Relevance

“…At last, SACs with homogeneously dispersed reactive centers can be obtained after further reduction or activation. Although the SACs prepared by these strategies usually faced up with some drawbacks, such as low loading contents and poor dispersion of single atoms, wet-chemistry strategies have been extensively adopted as effective and convenient methods to prepare SACs [ 35 , 36 ]. Zhang and colleagues have successfully developed a series of SACs via co-precipitation method with the metal atoms ranging from Pt, Ir to Au [ 11 , 37 – 39 ].…”

Section: Rational Designs Of Sacsmentioning

confidence: 99%

Engineering the Coordination Sphere of Isolated Active Sites to Explore the Intrinsic Activity in Single-Atom Catalysts

et al. 2021

Self Cite

View full text Add to dashboard Cite

Reducing the dimensions of metallic nanoparticles to isolated, single atom has attracted considerable attention in heterogeneous catalysis, because it significantly improves atomic utilization and often leads to distinct catalytic performance. Through extensive research, it has been recognized that the local coordination environment of single atoms has an important influence on their electronic structures and catalytic behaviors. In this review, we summarize a series of representative systems of single-atom catalysts, discussing their preparation, characterization, and structure–property relationship, with an emphasis on the correlation between the coordination spheres of isolated reactive centers and their intrinsic catalytic activities. We also share our perspectives on the current challenges and future research promises in the development of single-atom catalysis. With this article, we aim to highlight the possibility of finely tuning the catalytic performances by engineering the coordination spheres of single-atom sites and provide new insights into the further development for this emerging research field.

show abstract

Section: Rational Designs Of Sacsmentioning

confidence: 99%

Engineering the Coordination Sphere of Isolated Active Sites to Explore the Intrinsic Activity in Single-Atom Catalysts

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Polymer electrolyte membrane fuel cells (PEMFCs) provide a direct way to convert chemical energy to electricity, and are promising to be applied in electric vehicles and portable electronics. [1] Among various PEMFCs, direct methanol fuel cells (DMFCs) have long been considered as the promising energy technologies to replace lithium-ion batteries due to their high energy density, low operating temperature, and low emissions. [2] Unfortunately, both methanol oxidation reaction (MOR) at the anode and oxygen reduction reaction (ORR) at the cathode involving the multi-electron transfer cause seriously sluggish kinetics, thereby limiting the efficiency of renewable energy devices.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, platinum (Pt) metal is the most active electrocatalyst for fuel cells, especially for MOR and ORR. However, it often suffers from multiple disadvantages, including low selectivity, poor durability from methanol crossover as well as susceptibility to CO poisoning, thereby greatly hindering its broad deployment for both stationary and portable applications [1b,4] …”

Section: Introductionmentioning

confidence: 99%

Pt₃Co@Pt Core@shell Nanoparticles as Efficient Oxygen Reduction Electrocatalysts in Direct Methanol Fuel Cell

et al. 2021

Self Cite

View full text Add to dashboard Cite

Core-shell structured bimetallic platinum-metal (PtÀ M) nanoparticles, as a new class of active and stable nanocatalysts, have shown many advantages in increasing the utilization of precious Pt and improving electrocatalytic performances. Here, a core-shell Pt 3 Co@Pt supported on porous graphitic carbon (denoted as Pt 3 Co@Pt/C) is synthesized via a simple thermal method, and further used as an efficient electrocatalyst for oxygen reduction reaction (ORR) in the direct methanol fuel cell. An atomic-resolution high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) measurement combining with line-profile analysis reveals that the average thickness of Pt-shell is around 0.4-0.6 nm, forming an ultrathin catalytic layer. Given its unique geometric and electronic structure, the as-prepared Pt 3 Co@Pt/C displays highly enhanced electrocatalytic ORR activity and stability, boosted anti-methanol poisoning ability with a high onset potential and an exceptional half-wave potential in 0.1 M HClO 4 solution. Impressively, its mass activity (0.71 mA mg Pt À 1) and specific activity (2.75 mA cm Pt À 2) for ORR are 3.7-and 8.1-fold higher than those of commercial Pt/C catalyst, respectively. The Pt 3 Co@Pt/C nanocatalysts show remarkable tolerance against methanol poisoning, evidenced by the in situ Fourier-transform infrared (FTIR) spectroscopy. This work points out a path for the design of high-performance nanocatalysts for accelerating the development of clean energy technologies involving ORR.

show abstract

“…With increases in the loading amounts of Fe and Fe 3 O 4 , the R ohm values decrease to 2.57, 1.08, 0.94, and 0.71 Ω for AF-0.48, AF-0.8, AF-1.12, and AF-1.6, respectively. Such a significant decrease occurred because the Fe element contributed to structural rearrangement and more active sites on the carbon surface, which accelerates charge separation and transport [ 59 , 60 , 61 , 62 ]. In the low-frequency region, the impedance plots of all samples become oblique lines, showing pure capacitance.…”

Section: Resultsmentioning

confidence: 99%

Effects of Fe Impurities on Self-Discharge Performance of Carbon-Based Supercapacitors

Mao

Chen

2021

Materials

View full text Add to dashboard Cite

Activated carbon is widely used as an electrode material in supercapacitors due to its superior electrochemical stability, excellent electrical conductivity, and environmental friendliness. In this study, the self-discharge mechanisms of activated carbon electrodes loaded with different contents of Fe impurities (Fe and Fe3O4) were analyzed by multi-stage fitting to explore the tunability of self-discharge. It is was found that a small quantity of Fe impurities on carbon materials improves the self-discharge performance dominated by redox reaction, by adjusting the surface state and pore structure of carbon materials. As the content of Fe impurities increases, the voltage loss of activated carbon with the Fe impurity concentrations of 1.12 wt.% (AF-1.12) decreases by 37.9% of the original, which is attributable to the reduce of ohmic leakage and diffusion, and the increase in Faradic redox at the electrode/electrolyte interface. In summary, self-discharge performance of carbon-based supercapacitors can be adjusted via the surface state and pour structure, which provides insights for the future design of energy storage.

show abstract

Recent Progress of Carbon-Supported Single-Atom Catalysts for Energy Conversion and Storage

Cited by 221 publications

References 162 publications

Engineering the Coordination Sphere of Isolated Active Sites to Explore the Intrinsic Activity in Single-Atom Catalysts

Engineering the Coordination Sphere of Isolated Active Sites to Explore the Intrinsic Activity in Single-Atom Catalysts

Pt₃Co@Pt Core@shell Nanoparticles as Efficient Oxygen Reduction Electrocatalysts in Direct Methanol Fuel Cell

Effects of Fe Impurities on Self-Discharge Performance of Carbon-Based Supercapacitors

Contact Info

Product

Resources

About

Recent Progress of Carbon-Supported Single-Atom Catalysts for Energy Conversion and Storage

Cited by 221 publications

References 162 publications

Engineering the Coordination Sphere of Isolated Active Sites to Explore the Intrinsic Activity in Single-Atom Catalysts

Engineering the Coordination Sphere of Isolated Active Sites to Explore the Intrinsic Activity in Single-Atom Catalysts

Pt3Co@Pt Core@shell Nanoparticles as Efficient Oxygen Reduction Electrocatalysts in Direct Methanol Fuel Cell

Effects of Fe Impurities on Self-Discharge Performance of Carbon-Based Supercapacitors

Contact Info

Product

Resources

About

Pt₃Co@Pt Core@shell Nanoparticles as Efficient Oxygen Reduction Electrocatalysts in Direct Methanol Fuel Cell