High-performance nitrogen photofixation by Bi2Sn2O7 nanoparticles enriched with oxygen vacancies

Photochemical Ammonia Synthesis over Reduced Polyoxovanadate-Intercalated Defective ZnAl Layered Double Hydroxide Nanosheets

“…The 0.5%-ZnAl LDH was found to provide chemically adsorbed and activated sites for N 2 fixation. , What is more, the POVs as photoinduced electron donors play vital roles in the nitrogen photofixation. Similarly, such photo-driven N 2 fixation catalysts can be comparable to Wang et al’s Bi 4 O 5 Br/ZIF-8 with 327.3 μmol h –1 g –1 , Ji et al’s Bi 2 Sn 2 O 7 with 231 μmol h –1 g –1 , Yao et al’s amine-inserted MIL-68­(In) with 140.3 μmol h –1 g –1 , and so on. Moreover, V 34 /0.5%-ZnAl possesses a superior activity value to the other POV/0.5%-ZnAl composite materials, manifesting that the introduction of low-valence V elements into the POVs can impact the nitrogen photofixation activity.…”

“…Ammonia is not only a highly important ingredient of the global industrial economy and agricultural development but also a valuable candidate for hydrogen storage owing to its carbon-free and liquefiable feature. − The Haber–Bosch process serves as the classical industrial NH 3 synthesis technology usually performing the dissociative nitrogen reduction pathway under high energy input, which produces approximately 1% of the total CO 2 emission on the world. , In recent years, nitrogen photofixation achieves solar-to-chemical energy conversion under ambient conditions, indicating a feasible pathway for ammonia synthesis. − Suitable photocatalysts, the core of such nitrogen photofixation processes, directly harvest solar energy to generate an abundance of electrons, facilitating the NN triple-bond activation and dissociation. − In fact, the ammonia synthesis efficiency is still far from satisfactory mainly due to limited light absorption and poor charge carrier separation. , Therefore, the development of brand-new photocatalysts featuring a wide absorption range as well as highly efficient electron transport efficiency is crucial to realize efficient nitrogen fixation under ambient conditions.…”

“…1−3 The Haber−Bosch process serves as the classical industrial NH 3 synthesis technology usually performing the dissociative nitrogen reduction pathway under high energy input, which produces approximately 1% of the total CO 2 emission on the world. 4,5 In recent years, nitrogen photofixation achieves solar-to-chemical energy conversion under ambient conditions, indicating a feasible pathway for ammonia synthesis. 6−8 Suitable photocatalysts, the core of such nitrogen photofixation processes, directly harvest solar energy to generate an abundance of electrons, facilitating the N�N triple-bond activation and dissociation.…”

Atomic Cobalt–Silver Dual-Metal Sites Confined on Carbon Nitride with Synergistic Ag Nanoparticles for Enhanced CO2 Photoreduction

“…To reveal the surface elemental compositions and chemical states, X-ray photoelectron spectroscopy (XPS) analysis was conducted and a carbon peak correction on the XPS spectrum was performed for the carbon element in the samples. , The XPS survey spectra indicated the presence of C, N, Ag, Co, and P in Co 1 Ag (1+ n ) –PCN (Figure a). The Co 2p spectra of Co 1 Ag (1+ n ) –PCN exhibited two peaks assigned to Co 2p 3/2 and 2p 1/2 , where the deconvoluted peak at 782.3 eV denoted the existence of Co 2+ (Figure b) .…”

Integrating biomass and minerals into photocatalysts for efficient photocatalytic N2 fixation coupled with biomass conversion

“…2 The traditional Haber-Bosch process has been instrumental in industrial NH 3 manufacturing but is plagued by harsh operating conditions and substantial CO 2 emissions. 3 To address these issues, considerable research efforts have been directed toward photocatalytic N 2 fixation, which enables the synthesis of ammonia through the coupling of nitrogen reduction with water oxi-dation. In general, the hydrogen protons (H + ) required for photocatalytic nitrogen fixation to ammonia are derived from the oxidation of water.…”