Zr-doped α-FeOOH with high faradaic efficiency for electrochemical nitrogen reduction reaction

Ru/Rh Cation Doping and Oxygen‐Vacancy Engineering of FeOOH Nanoarrays@Ti3C2Tx MXene Heterojunction for Highly Efficient and Stable Electrocatalytic Oxygen Evolution

“…The Raman spectra of Ru/Rh-FeOOH@Ti 3 C 2 T x MXene after OER tests are exhibited in Figure S22a,b (Supporting Information), four peaks are associated with the characteristic Raman bands of typical α-FeOOH reported in literature. [54,71] As expected, the morphologies of 3%Ru-FeOOH@Ti 3 C 2 T x MXene and 3%Rh-FeOOH@Ti 3 C 2 T x MXene after OER test did not give obvious change, demonstrating their excellent structural stability and durability (Figure S23a,b, Supporting Information). The above test results demonstrate that their microstructures and components have no obvious change before and after OER reaction, further verifying the excellent stability of Rh/ Ru-doped FeOOH@Ti 3 C 2 T x MXene.…”

“…[53] Figure 4b shows that the O 1s spectra, which were composed of three contributions of lattice O at 529.9 eV, O vacancy at 531.3 eV, and OH group (Fe-OH) at 532.6 eV, respectively. [54] Differently, the O-vacancy content in O 1s spectrum of 3%Rh-FeOOH@Ti 3 C 2 T x Small 2022, 18, 2200173 MXene (64.9%) or 3%Ru-FeOOH@Ti 3 C 2 T x MXene (63.6%) is significantly higher than that of pure FeOOH@Ti 3 C 2 T x MXene (56.0%), suggesting Rh or Ru doping can significantly increase the O-vacancy content of FeOOH, thus intrinsically improving the catalytic activity. For FeOOH@Ti 3 C 2 T x MXene and 3%Rh-FeOOH@Ti 3 C 2 T x MXene, the C 1s spectrum (Figure 4c) with three apparent peaks of 284.7, 285.7, and 288.6 eV can be indexed to the peaks of CC, CO, and OCO, respectively.…”

Designing mixed-metal electrocatalyst systems for photoelectrochemical dinitrogen activation

“…2 Generally, the electrochemical NRR bears several challenges, such as the stable N^N bond (942 kJ mol −1 ) and a low product selectivity due to the competing, kinetically favoured hydrogen evolution reaction (HER). So far, only very few approaches report the successful electrochemical activation of dinitrogen (N 2 (g)) and its reduction as well as consecutive protonation [3][4][5][6][7][8][9][10][11] as all suffer from low yields and reaction efficiencies. Crucial for realising the efficient and stable electrochemical NRR is the (photo-)electrode design and the choice of electrocatalyst material.…”

ZrO2/C Nanosphere Enables High‐Efficiency Nitrogen Reduction to Ammonia at Ambient Conditions

“…[28,29] Considering the low-down solubility of nitrogen in the commonly used 0.1 M Na 2 SO 4 , metal-organic frameworks (MOFs) with massive surface area and ordered multi-space three-dimensional structure can primely adsorb and store nitrogen by regulating the electronic structure of transition metals in their lattice. [30][31][32] This simple by high temperature pyrolysis preparation of metal organic crystal materials, on the one hand, has the high electrical conductivity, enhance the internal mass transfer and charge transfer catalyst. [33] On the other hand to promote highly fragmented surface-active sites and adjustable porosity, a large number of multistage pore sizes enable solid/liquid contact reactions and the gas is easier to adsorb, implying greatly improvement of the properties and stability of material.…”