A Durable Metalloporphyrin 2D‐Polymer for Photocatalytic Hydrogen and Oxygen Evolution from River and Sea Waters

Abstract

It is highly imaginary that the outcome of a combination of two complementary resources leads to answer an alarming global issue. One such possible example is the solar seawater splitting for ‘clean fuel’ H2 generation. Since the catalytic activity and stability of the photocatalysts are substantially challenged in seawater, the design of an efficient and stable photocatalyst is highly desirable. Herein, we demonstrate the solar seawater splitting by a two‐dimensional polymer catalyst derived from metalloporphyrin bearing multi‐hydroxyl groups. A bimetallic (Co and Ni) porphyrin 2D‐polymer exhibits excellent long‐term durability of 15 cycles of H2 and O2 generation in 200 days from pure water without a considerable decrease in efficiency. Detailed studies using river and seawaters also show the reliable performance of the catalyst over repeated cycles. Here the deactivation modes of catalytic activity have been nullified by the layered metalloporphyrin polymer structure through stable π−π stacking, signifying the molecular design of 2D‐polymer photocatalyst.

Porphyrins and phthalocyanines as biomimetic tools for photocatalytic H2production and CO2reduction

“…This material was further developed by the same research team in the following years. 118 The authors used different metal ions to metallate the porphyrin 2D-polymer, namely Co( ii ), Ni( ii ) and Zn( ii ), and synthesized the four derivatives described in Fig. 19d.…”

Photocatalytic seawater splitting for hydrogen fuel production: impact of seawater components and accelerating reagents on the overall performance

“…This study makes using two-dimensional polymers as a bifunctional catalyst for sunlight-induced water splitting more evident. 108 Lu et al (2022) reported that carbon nitride tubes that are hollow and lled with carbon dots have been used for producing hydrogen from water or saltwater with the help of light.…”

“…This study makes using two-dimensional polymers as a bifunctional catalyst for sunlight-induced water splitting more evident. 108…”

Scalable Mechanochemical Synthesis of β‐Ketoenamine‐linked Covalent Organic Frameworks for Methane Storage

“…Facile preparation, functionality, modularity, stability, and scalability have made these frameworks ideal for different applications. [16][17][18] The intrinsic porosity and high crystallinity of COFs make them suitable for gas [19][20][21][22][23][24][25] and energy storage, [26][27][28][29][30][31][32][33][34] targeted drug delivery, [35][36][37][38][39] molecular sorption and separation, [40][41][42][43][44][45] molecular sensing, [46][47][48][49][50] catalysis [51][52][53][54][55][56][57][58] etc. Though different applications have been explored for COF, the synthetic methodologies adopted limited the bulk-scale synthesis of these materials.…”