Carbon-coated hollow mesoporous FeP microcubes: an efficient and stable electrocatalyst for hydrogen evolution

Abstract

Carbon coated hollow mesoporous FeP microcubes derived from Prussian blue were superior in catalytic activity and durability toward electrochemical hydrogen evolution with an overpotential of 115 mV to drive 10 mA cm−2.

Facile Synthesis of Hierarchical Iron Phosphide/Biomass Carbon Composites for Binder‐Free Sodium‐Ion Batteries

“…The corresponding reversible areal capacity is about 1.5 mAh cm −2 (Figure S6†). The phenomenon of IPs/BC composites is similar with the other iron phosphide/carbon composites at the same current density . The superior specific capacity and stable cycliability are outstanding compared to the other previously reported related iron phosphides based anode materials (Table.S1).…”

“…Furthermore, the peak at 133.2 eV can be attributed to the superficial oxidation of P species in iron phosphides exposed to air . The high‐resolution XPS spectrum of C 1s shows four fitted peaks at 284.6 eV, 286.2 eV, 287.5 eV, 288.6 eV, which are attributed to sp 2 hybridized graphitic C atoms, C−O species, C=O, and O−C=O (Figure e) …”

Hollow Structures Based on Prussian Blue and Its Analogs for Electrochemical Energy Storage and Conversion

“…Compared to benchmark preciousmetal based electrocatalysts, 3d-metal-based alternatives have attracted increasing attention due to their low cost and comparable efficiency. [111] Hollow and porous features are evidenced by TEM analysis (Figure 9a). [22] HER is the cathodic half-reaction in water splitting to convert water to H 2 , which is a promising clean energy carrier to replace hydrocarbon.…”

“…Electrocatalysts ideally with features of being efficient, durable, low-cost, and sustainable are generally needed to reduce the activation energy and increase the conversion rate for those important energyrelated electrochemical processes, including hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR). [63,68,110,111] For example, Zhu et al reported a facile rout to prepare carboncoated mesoporous FeP boxes (HMFeP@C) using PB cubes as the precursor. [22,23] For electrocatalysis, hollow constructs are considered superior to the solid counterparts as they could provide a higher area of the catalytic interface, thus significantly improving the electrocatalytic performance.…”

“…[63,68,110,111] For example, Zhu et al reported a facile rout to prepare carboncoated mesoporous FeP boxes (HMFeP@C) using PB cubes as the precursor. [111] It should be noted that this value is also lower than that of the Ni-Co-MoS 2 nanoboxes (155 mV) derived from PBA nanocubes (Figure 2m) in the same acidic medium. The SAED pattern shows concentric rings indexed to the (212), (211), (202), and (111) planes of orthorhombic FeP, indicating the polycrystalline feature (inset of Figure 9a).…”