Prussian blue derived Fe₂N for efficiently improving the photocatalytic hydrogen evolution activity of g-C₃N₄ nanosheets

Abstract

Prussian blue derived Fe2N nanoparticles to efficiently improve the photocatalytic H2-generation rate over pure g-C3N4 nanosheets.

Unveiling the Activity Origin of Iron Nitride as Catalytic Material for Efficient Hydrogenation of CO2 to C2+ Hydrocarbons

“…More importantly, these results unveiled that the iron carbides acted as the veritable active species of iron nitrides for the selective hydrogenation of CO 2 , identifying the high activity origin. To further validate the iron carbides as the activity origin, X‐ray photoelectron spectroscopy (XPS) and Mössbauer spectroscopy were employed to analyze fresh and 1h‐activated Fe 2 N@C. After activating for 1 h, the peak for Fe‐N at 707.6 eV [20] vanished. In contrast, the 707.2 and 720.1 eV [21] attributing to Fe‐C appeared (Figure 3 e), verifying the in situ transformation from iron nitrides to iron carbides.…”

Metal organic framework-derived porous Fe2N nanocubes by rapid-nitridation for efficient photocatalytic hydrogen evolution

“…These characteristics make them promising in the field of catalytic hydrogen production. [6][7][8][9][10][11][12] However, there are challenges associated with the synthesis of TMNs. Notably, the traditional synthesis of TMNs involves high temperatures and pressures.…”

“…The products thus formed tend to have larger particle sizes, and hence are rarely suitable for catalytic purposes. 6,8,[13][14][15] Furthermore, conventional ammonothermal and nitridation techniques pose significant challenges to scalability. It is very important to industrial applications.…”

“…However currently, due to synthetic developments, TMN materials can be synthesized in the nano-regime with different morphologies. 6,8,[16][17][18][19] Currently, both (i) low temperature, rapid and high yield methods of preparation and (ii) nanosizing are imperative for the eventual success of TMNs in catalysis and related areas. In particular, there is value in developing methods that enable the production of porous 3D TMNs using soft chemical approaches.…”

“…Previously we reported the synthesis of PB-derived metal nitrides, which yielded nanoparticles without substantial porosity. 8 Therefore, a novel synthesis process is highly desirable for achieving MOF-derived porous metal nitrides which nearly retain the specific structure of the parent precursor; this would be highly desirable for catalytic applications.…”